*
* Copyright (c) 2003 Fabrice Bellard
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
+#include <signal.h>
#include <assert.h>
+#include <sys/mman.h>
-#define DEBUG_DISAS
-
-#define IN_OP_I386
#include "cpu-i386.h"
+#include "exec.h"
+#include "disas.h"
-/* dump all code */
-#ifdef DEBUG_DISAS
-#include "dis-asm.h"
-#endif
-
-static uint8_t *gen_code_ptr;
-int __op_param1, __op_param2, __op_param3;
+//#define DEBUG_MMU
-extern FILE *logfile;
-extern int loglevel;
+/* XXX: move that elsewhere */
+static uint16_t *gen_opc_ptr;
+static uint32_t *gen_opparam_ptr;
-/* supress that */
-static void error(const char *fmt, ...)
-{
- va_list ap;
-
- va_start(ap, fmt);
- fprintf(stderr, "\n");
- vfprintf(stderr, fmt, ap);
- fprintf(stderr, "\n");
- va_end(ap);
- exit(1);
-}
-
-#define PREFIX_REPZ 1
-#define PREFIX_REPNZ 2
-#define PREFIX_LOCK 4
-#define PREFIX_CS 8
-#define PREFIX_SS 0x10
-#define PREFIX_DS 0x20
-#define PREFIX_ES 0x40
-#define PREFIX_FS 0x80
-#define PREFIX_GS 0x100
-#define PREFIX_DATA 0x200
-#define PREFIX_ADR 0x400
-#define PREFIX_FWAIT 0x800
+#define PREFIX_REPZ 0x01
+#define PREFIX_REPNZ 0x02
+#define PREFIX_LOCK 0x04
+#define PREFIX_DATA 0x08
+#define PREFIX_ADR 0x10
typedef struct DisasContext {
/* current insn context */
+ int override; /* -1 if no override */
int prefix;
int aflag, dflag;
- uint8_t *pc; /* current pc */
- int cc_op; /* current CC operation */
- int f_st;
+ uint8_t *pc; /* pc = eip + cs_base */
+ int is_jmp; /* 1 = means jump (stop translation), 2 means CPU
+ static state change (stop translation) */
+ /* current block context */
+ uint8_t *cs_base; /* base of CS segment */
+ int code32; /* 32 bit code segment */
+ int ss32; /* 32 bit stack segment */
+ int cc_op; /* current CC operation */
+ int addseg; /* non zero if either DS/ES/SS have a non zero base */
+ int f_st; /* currently unused */
+ int vm86; /* vm86 mode */
+ int cpl;
+ int iopl;
+ int tf; /* TF cpu flag */
+ struct TranslationBlock *tb;
+ int popl_esp_hack; /* for correct popl with esp base handling */
} DisasContext;
/* i386 arith/logic operations */
OP_SAR = 7,
};
-#include "op-i386.h"
+enum {
+#define DEF(s, n, copy_size) INDEX_op_ ## s,
+#include "opc-i386.h"
+#undef DEF
+ NB_OPS,
+};
+
+#include "gen-op-i386.h"
/* operand size */
enum {
typedef void (GenOpFunc)(void);
typedef void (GenOpFunc1)(long);
typedef void (GenOpFunc2)(long, long);
+typedef void (GenOpFunc3)(long, long, long);
static GenOpFunc *gen_op_mov_reg_T0[3][8] = {
[OT_BYTE] = {
},
};
+static GenOpFunc *gen_op_cmov_reg_T1_T0[2][8] = {
+ [0] = {
+ gen_op_cmovw_EAX_T1_T0,
+ gen_op_cmovw_ECX_T1_T0,
+ gen_op_cmovw_EDX_T1_T0,
+ gen_op_cmovw_EBX_T1_T0,
+ gen_op_cmovw_ESP_T1_T0,
+ gen_op_cmovw_EBP_T1_T0,
+ gen_op_cmovw_ESI_T1_T0,
+ gen_op_cmovw_EDI_T1_T0,
+ },
+ [1] = {
+ gen_op_cmovl_EAX_T1_T0,
+ gen_op_cmovl_ECX_T1_T0,
+ gen_op_cmovl_EDX_T1_T0,
+ gen_op_cmovl_EBX_T1_T0,
+ gen_op_cmovl_ESP_T1_T0,
+ gen_op_cmovl_EBP_T1_T0,
+ gen_op_cmovl_ESI_T1_T0,
+ gen_op_cmovl_EDI_T1_T0,
+ },
+};
+
static GenOpFunc *gen_op_arith_T0_T1_cc[8] = {
- gen_op_addl_T0_T1_cc,
- gen_op_orl_T0_T1_cc,
NULL,
+ gen_op_orl_T0_T1,
+ NULL,
+ NULL,
+ gen_op_andl_T0_T1,
+ NULL,
+ gen_op_xorl_T0_T1,
NULL,
- gen_op_andl_T0_T1_cc,
- gen_op_subl_T0_T1_cc,
- gen_op_xorl_T0_T1_cc,
- gen_op_cmpl_T0_T1_cc,
};
static GenOpFunc *gen_op_arithc_T0_T1_cc[3][2] = {
CC_OP_SUBB,
};
+static GenOpFunc *gen_op_cmpxchg_T0_T1_EAX_cc[3] = {
+ gen_op_cmpxchgb_T0_T1_EAX_cc,
+ gen_op_cmpxchgw_T0_T1_EAX_cc,
+ gen_op_cmpxchgl_T0_T1_EAX_cc,
+};
+
static GenOpFunc *gen_op_shift_T0_T1_cc[3][8] = {
[OT_BYTE] = {
gen_op_rolb_T0_T1_cc,
gen_op_stl_T0_A0,
};
-static GenOpFunc *gen_op_movs[6] = {
- gen_op_movsb,
- gen_op_movsw,
- gen_op_movsl,
- gen_op_rep_movsb,
- gen_op_rep_movsw,
- gen_op_rep_movsl,
+/* the _a32 and _a16 string operations use A0 as the base register. */
+
+#define STRINGOP(x) \
+ gen_op_ ## x ## b_fast, \
+ gen_op_ ## x ## w_fast, \
+ gen_op_ ## x ## l_fast, \
+ gen_op_ ## x ## b_a32, \
+ gen_op_ ## x ## w_a32, \
+ gen_op_ ## x ## l_a32, \
+ gen_op_ ## x ## b_a16, \
+ gen_op_ ## x ## w_a16, \
+ gen_op_ ## x ## l_a16,
+
+static GenOpFunc *gen_op_movs[9 * 2] = {
+ STRINGOP(movs)
+ STRINGOP(rep_movs)
};
-static GenOpFunc *gen_op_stos[6] = {
- gen_op_stosb,
- gen_op_stosw,
- gen_op_stosl,
- gen_op_rep_stosb,
- gen_op_rep_stosw,
- gen_op_rep_stosl,
+static GenOpFunc *gen_op_stos[9 * 2] = {
+ STRINGOP(stos)
+ STRINGOP(rep_stos)
};
-static GenOpFunc *gen_op_lods[6] = {
- gen_op_lodsb,
- gen_op_lodsw,
- gen_op_lodsl,
- gen_op_rep_lodsb,
- gen_op_rep_lodsw,
- gen_op_rep_lodsl,
+static GenOpFunc *gen_op_lods[9 * 2] = {
+ STRINGOP(lods)
+ STRINGOP(rep_lods)
};
-static GenOpFunc *gen_op_scas[9] = {
- gen_op_scasb,
- gen_op_scasw,
- gen_op_scasl,
- gen_op_repz_scasb,
- gen_op_repz_scasw,
- gen_op_repz_scasl,
- gen_op_repnz_scasb,
- gen_op_repnz_scasw,
- gen_op_repnz_scasl,
+static GenOpFunc *gen_op_scas[9 * 3] = {
+ STRINGOP(scas)
+ STRINGOP(repz_scas)
+ STRINGOP(repnz_scas)
};
-static GenOpFunc *gen_op_cmps[9] = {
- gen_op_cmpsb,
- gen_op_cmpsw,
- gen_op_cmpsl,
- gen_op_repz_cmpsb,
- gen_op_repz_cmpsw,
- gen_op_repz_cmpsl,
- gen_op_repnz_cmpsb,
- gen_op_repnz_cmpsw,
- gen_op_repnz_cmpsl,
+static GenOpFunc *gen_op_cmps[9 * 3] = {
+ STRINGOP(cmps)
+ STRINGOP(repz_cmps)
+ STRINGOP(repnz_cmps)
};
-static GenOpFunc *gen_op_ins[6] = {
- gen_op_insb,
- gen_op_insw,
- gen_op_insl,
- gen_op_rep_insb,
- gen_op_rep_insw,
- gen_op_rep_insl,
+static GenOpFunc *gen_op_ins[9 * 2] = {
+ STRINGOP(ins)
+ STRINGOP(rep_ins)
};
-static GenOpFunc *gen_op_outs[6] = {
- gen_op_outsb,
- gen_op_outsw,
- gen_op_outsl,
- gen_op_rep_outsb,
- gen_op_rep_outsw,
- gen_op_rep_outsl,
+static GenOpFunc *gen_op_outs[9 * 2] = {
+ STRINGOP(outs)
+ STRINGOP(rep_outs)
};
+
+static inline void gen_string_ds(DisasContext *s, int ot, GenOpFunc **func)
+{
+ int index, override;
+
+ override = s->override;
+ if (s->aflag) {
+ /* 32 bit address */
+ if (s->addseg && override < 0)
+ override = R_DS;
+ if (override >= 0) {
+ gen_op_movl_A0_seg(offsetof(CPUX86State,segs[override].base));
+ index = 3 + ot;
+ } else {
+ index = ot;
+ }
+ } else {
+ if (override < 0)
+ override = R_DS;
+ gen_op_movl_A0_seg(offsetof(CPUX86State,segs[override].base));
+ /* 16 address, always override */
+ index = 6 + ot;
+ }
+ func[index]();
+}
+
+static inline void gen_string_es(DisasContext *s, int ot, GenOpFunc **func)
+{
+ int index;
+
+ if (s->aflag) {
+ if (s->addseg) {
+ index = 3 + ot;
+ } else {
+ index = ot;
+ }
+ } else {
+ index = 6 + ot;
+ }
+ func[index]();
+}
+
+
static GenOpFunc *gen_op_in[3] = {
gen_op_inb_T0_T1,
gen_op_inw_T0_T1,
JCC_LE,
};
-static GenOpFunc2 *gen_jcc_slow[8] = {
- gen_op_jo_cc,
- gen_op_jb_cc,
- gen_op_jz_cc,
- gen_op_jbe_cc,
- gen_op_js_cc,
- gen_op_jp_cc,
- gen_op_jl_cc,
- gen_op_jle_cc,
-};
-
-static GenOpFunc2 *gen_jcc_sub[3][8] = {
+static GenOpFunc3 *gen_jcc_sub[3][8] = {
[OT_BYTE] = {
NULL,
gen_op_jb_subb,
gen_op_jle_subl,
},
};
+static GenOpFunc2 *gen_op_loop[2][4] = {
+ [0] = {
+ gen_op_loopnzw,
+ gen_op_loopzw,
+ gen_op_loopw,
+ gen_op_jecxzw,
+ },
+ [1] = {
+ gen_op_loopnzl,
+ gen_op_loopzl,
+ gen_op_loopl,
+ gen_op_jecxzl,
+ },
+};
static GenOpFunc *gen_setcc_slow[8] = {
gen_op_seto_T0_cc,
gen_op_fdiv_STN_ST0,
};
-static void gen_op(DisasContext *s1, int op, int ot, int d, int s)
+/* if d == OR_TMP0, it means memory operand (address in A0) */
+static void gen_op(DisasContext *s1, int op, int ot, int d)
{
- if (d != OR_TMP0)
+ GenOpFunc *gen_update_cc;
+
+ if (d != OR_TMP0) {
gen_op_mov_TN_reg[ot][0][d]();
- if (s != OR_TMP1)
- gen_op_mov_TN_reg[ot][1][s]();
- if (op == OP_ADCL || op == OP_SBBL) {
+ } else {
+ gen_op_ld_T0_A0[ot]();
+ }
+ switch(op) {
+ case OP_ADCL:
+ case OP_SBBL:
if (s1->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s1->cc_op);
gen_op_arithc_T0_T1_cc[ot][op - OP_ADCL]();
s1->cc_op = CC_OP_DYNAMIC;
- } else {
+ /* XXX: incorrect: CC_OP must also be modified AFTER memory access */
+ gen_update_cc = gen_op_update2_cc;
+ break;
+ case OP_ADDL:
+ gen_op_addl_T0_T1();
+ s1->cc_op = CC_OP_ADDB + ot;
+ gen_update_cc = gen_op_update2_cc;
+ break;
+ case OP_SUBL:
+ gen_op_subl_T0_T1();
+ s1->cc_op = CC_OP_SUBB + ot;
+ gen_update_cc = gen_op_update2_cc;
+ break;
+ default:
+ case OP_ANDL:
+ case OP_ORL:
+ case OP_XORL:
gen_op_arith_T0_T1_cc[op]();
- s1->cc_op = cc_op_arithb[op] + ot;
+ s1->cc_op = CC_OP_LOGICB + ot;
+ gen_update_cc = gen_op_update1_cc;
+ break;
+ case OP_CMPL:
+ gen_op_cmpl_T0_T1_cc();
+ s1->cc_op = CC_OP_SUBB + ot;
+ gen_update_cc = NULL;
+ break;
}
- if (d != OR_TMP0 && op != OP_CMPL)
- gen_op_mov_reg_T0[ot][d]();
-}
-
-static void gen_opi(DisasContext *s1, int op, int ot, int d, int c)
-{
- gen_op_movl_T1_im(c);
- gen_op(s1, op, ot, d, OR_TMP1);
+ if (op != OP_CMPL) {
+ if (d != OR_TMP0)
+ gen_op_mov_reg_T0[ot][d]();
+ else
+ gen_op_st_T0_A0[ot]();
+ }
+ /* the flags update must happen after the memory write (precise
+ exception support) */
+ if (gen_update_cc)
+ gen_update_cc();
}
+/* if d == OR_TMP0, it means memory operand (address in A0) */
static void gen_inc(DisasContext *s1, int ot, int d, int c)
{
if (d != OR_TMP0)
gen_op_mov_TN_reg[ot][0][d]();
+ else
+ gen_op_ld_T0_A0[ot]();
if (s1->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s1->cc_op);
if (c > 0) {
- gen_op_incl_T0_cc();
+ gen_op_incl_T0();
s1->cc_op = CC_OP_INCB + ot;
} else {
- gen_op_decl_T0_cc();
+ gen_op_decl_T0();
s1->cc_op = CC_OP_DECB + ot;
}
if (d != OR_TMP0)
gen_op_mov_reg_T0[ot][d]();
+ else
+ gen_op_st_T0_A0[ot]();
+ gen_op_update_inc_cc();
}
static void gen_shift(DisasContext *s1, int op, int ot, int d, int s)
static void gen_lea_modrm(DisasContext *s, int modrm, int *reg_ptr, int *offset_ptr)
{
int havesib;
- int havebase;
int base, disp;
- int index = 0;
- int scale = 0;
- int reg1, reg2, opreg;
- int mod, rm, code;
+ int index;
+ int scale;
+ int opreg;
+ int mod, rm, code, override, must_add_seg;
+ override = s->override;
+ must_add_seg = s->addseg;
+ if (override >= 0)
+ must_add_seg = 1;
mod = (modrm >> 6) & 3;
rm = modrm & 7;
if (s->aflag) {
havesib = 0;
- havebase = 1;
base = rm;
+ index = 0;
+ scale = 0;
if (base == 4) {
havesib = 1;
switch (mod) {
case 0:
if (base == 5) {
- havebase = 0;
+ base = -1;
disp = ldl(s->pc);
s->pc += 4;
} else {
s->pc += 4;
break;
}
-
- reg1 = OR_ZERO;
- reg2 = OR_ZERO;
-
- if (havebase || (havesib && (index != 4 || scale != 0))) {
- if (havebase)
- reg1 = OR_EAX + base;
- if (havesib && index != 4) {
- if (havebase)
- reg2 = index + OR_EAX;
- else
- reg1 = index + OR_EAX;
- }
- }
- /* XXX: disp only ? */
- if (reg2 == OR_ZERO) {
- /* op: disp + (reg1 << scale) */
- if (reg1 == OR_ZERO) {
- gen_op_movl_A0_im(disp);
- } else if (scale == 0 && disp == 0) {
- gen_op_movl_A0_reg[reg1]();
- } else {
- gen_op_movl_A0_im(disp);
- gen_op_addl_A0_reg_sN[scale][reg1]();
- }
+
+ if (base >= 0) {
+ /* for correct popl handling with esp */
+ if (base == 4 && s->popl_esp_hack)
+ disp += 4;
+ gen_op_movl_A0_reg[base]();
+ if (disp != 0)
+ gen_op_addl_A0_im(disp);
} else {
- /* op: disp + reg1 + (reg2 << scale) */
- if (disp != 0) {
- gen_op_movl_A0_im(disp);
- gen_op_addl_A0_reg_sN[0][reg1]();
- } else {
- gen_op_movl_A0_reg[reg1]();
+ gen_op_movl_A0_im(disp);
+ }
+ /* XXX: index == 4 is always invalid */
+ if (havesib && (index != 4 || scale != 0)) {
+ gen_op_addl_A0_reg_sN[scale][index]();
+ }
+ if (must_add_seg) {
+ if (override < 0) {
+ if (base == R_EBP || base == R_ESP)
+ override = R_SS;
+ else
+ override = R_DS;
}
- gen_op_addl_A0_reg_sN[scale][reg2]();
+ gen_op_addl_A0_seg(offsetof(CPUX86State,segs[override].base));
}
} else {
switch (mod) {
disp = lduw(s->pc);
s->pc += 2;
gen_op_movl_A0_im(disp);
+ rm = 0; /* avoid SS override */
goto no_rm;
} else {
disp = 0;
if (disp != 0)
gen_op_addl_A0_im(disp);
gen_op_andl_A0_ffff();
- no_rm: ;
+ no_rm:
+ if (must_add_seg) {
+ if (override < 0) {
+ if (rm == 2 || rm == 3 || rm == 6)
+ override = R_SS;
+ else
+ override = R_DS;
+ }
+ gen_op_addl_A0_seg(offsetof(CPUX86State,segs[override].base));
+ }
}
+
opreg = OR_A0;
disp = 0;
*reg_ptr = opreg;
return ret;
}
-static void gen_jcc(DisasContext *s, int b, int val)
+static inline void gen_jcc(DisasContext *s, int b, int val, int next_eip)
{
+ TranslationBlock *tb;
int inv, jcc_op;
- GenOpFunc2 *func;
+ GenOpFunc3 *func;
inv = b & 1;
jcc_op = (b >> 1) & 7;
case CC_OP_SUBW:
case CC_OP_SUBL:
func = gen_jcc_sub[s->cc_op - CC_OP_SUBB][jcc_op];
- if (!func)
- goto slow_jcc;
break;
/* some jumps are easy to compute */
func = gen_jcc_sub[(s->cc_op - CC_OP_ADDB) % 3][jcc_op];
break;
default:
- goto slow_jcc;
+ func = NULL;
+ break;
}
break;
default:
- slow_jcc:
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
- func = gen_jcc_slow[jcc_op];
+ func = NULL;
break;
}
+
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+
+ if (!func) {
+ gen_setcc_slow[jcc_op]();
+ func = gen_op_jcc;
+ }
+
+ tb = s->tb;
if (!inv) {
- func(val, (long)s->pc);
+ func((long)tb, val, next_eip);
} else {
- func((long)s->pc, val);
+ func((long)tb, next_eip, val);
}
+ s->is_jmp = 3;
}
static void gen_setcc(DisasContext *s, int b)
}
}
+/* move T0 to seg_reg and compute if the CPU state may change */
+static void gen_movl_seg_T0(DisasContext *s, int seg_reg, unsigned int cur_eip)
+{
+ if (!s->vm86)
+ gen_op_movl_seg_T0(seg_reg, cur_eip);
+ else
+ gen_op_movl_seg_T0_vm(offsetof(CPUX86State,segs[seg_reg]));
+ if (!s->addseg && seg_reg < R_FS)
+ s->is_jmp = 2; /* abort translation because the register may
+ have a non zero base */
+}
+
+/* generate a push. It depends on ss32, addseg and dflag */
+static void gen_push_T0(DisasContext *s)
+{
+ if (s->ss32) {
+ if (!s->addseg) {
+ if (s->dflag)
+ gen_op_pushl_T0();
+ else
+ gen_op_pushw_T0();
+ } else {
+ if (s->dflag)
+ gen_op_pushl_ss32_T0();
+ else
+ gen_op_pushw_ss32_T0();
+ }
+ } else {
+ if (s->dflag)
+ gen_op_pushl_ss16_T0();
+ else
+ gen_op_pushw_ss16_T0();
+ }
+}
+
+/* two step pop is necessary for precise exceptions */
+static void gen_pop_T0(DisasContext *s)
+{
+ if (s->ss32) {
+ if (!s->addseg) {
+ if (s->dflag)
+ gen_op_popl_T0();
+ else
+ gen_op_popw_T0();
+ } else {
+ if (s->dflag)
+ gen_op_popl_ss32_T0();
+ else
+ gen_op_popw_ss32_T0();
+ }
+ } else {
+ if (s->dflag)
+ gen_op_popl_ss16_T0();
+ else
+ gen_op_popw_ss16_T0();
+ }
+}
+
+static inline void gen_stack_update(DisasContext *s, int addend)
+{
+ if (s->ss32) {
+ if (addend == 2)
+ gen_op_addl_ESP_2();
+ else if (addend == 4)
+ gen_op_addl_ESP_4();
+ else
+ gen_op_addl_ESP_im(addend);
+ } else {
+ if (addend == 2)
+ gen_op_addw_ESP_2();
+ else if (addend == 4)
+ gen_op_addw_ESP_4();
+ else
+ gen_op_addw_ESP_im(addend);
+ }
+}
+
+static void gen_pop_update(DisasContext *s)
+{
+ gen_stack_update(s, 2 << s->dflag);
+}
+
+static void gen_stack_A0(DisasContext *s)
+{
+ gen_op_movl_A0_ESP();
+ if (!s->ss32)
+ gen_op_andl_A0_ffff();
+ gen_op_movl_T1_A0();
+ if (s->addseg)
+ gen_op_addl_A0_seg(offsetof(CPUX86State,segs[R_SS].base));
+}
+
+/* NOTE: wrap around in 16 bit not fully handled */
+static void gen_pusha(DisasContext *s)
+{
+ int i;
+ gen_op_movl_A0_ESP();
+ gen_op_addl_A0_im(-16 << s->dflag);
+ if (!s->ss32)
+ gen_op_andl_A0_ffff();
+ gen_op_movl_T1_A0();
+ if (s->addseg)
+ gen_op_addl_A0_seg(offsetof(CPUX86State,segs[R_SS].base));
+ for(i = 0;i < 8; i++) {
+ gen_op_mov_TN_reg[OT_LONG][0][7 - i]();
+ gen_op_st_T0_A0[OT_WORD + s->dflag]();
+ gen_op_addl_A0_im(2 << s->dflag);
+ }
+ gen_op_mov_reg_T1[OT_WORD + s->dflag][R_ESP]();
+}
+
+/* NOTE: wrap around in 16 bit not fully handled */
+static void gen_popa(DisasContext *s)
+{
+ int i;
+ gen_op_movl_A0_ESP();
+ if (!s->ss32)
+ gen_op_andl_A0_ffff();
+ gen_op_movl_T1_A0();
+ gen_op_addl_T1_im(16 << s->dflag);
+ if (s->addseg)
+ gen_op_addl_A0_seg(offsetof(CPUX86State,segs[R_SS].base));
+ for(i = 0;i < 8; i++) {
+ /* ESP is not reloaded */
+ if (i != 3) {
+ gen_op_ld_T0_A0[OT_WORD + s->dflag]();
+ gen_op_mov_reg_T0[OT_WORD + s->dflag][7 - i]();
+ }
+ gen_op_addl_A0_im(2 << s->dflag);
+ }
+ gen_op_mov_reg_T1[OT_WORD + s->dflag][R_ESP]();
+}
+
+/* NOTE: wrap around in 16 bit not fully handled */
+/* XXX: check this */
+static void gen_enter(DisasContext *s, int esp_addend, int level)
+{
+ int ot, level1, addend, opsize;
+
+ ot = s->dflag + OT_WORD;
+ level &= 0x1f;
+ level1 = level;
+ opsize = 2 << s->dflag;
+
+ gen_op_movl_A0_ESP();
+ gen_op_addl_A0_im(-opsize);
+ if (!s->ss32)
+ gen_op_andl_A0_ffff();
+ gen_op_movl_T1_A0();
+ if (s->addseg)
+ gen_op_addl_A0_seg(offsetof(CPUX86State,segs[R_SS].base));
+ /* push bp */
+ gen_op_mov_TN_reg[OT_LONG][0][R_EBP]();
+ gen_op_st_T0_A0[ot]();
+ if (level) {
+ while (level--) {
+ gen_op_addl_A0_im(-opsize);
+ gen_op_addl_T0_im(-opsize);
+ gen_op_st_T0_A0[ot]();
+ }
+ gen_op_addl_A0_im(-opsize);
+ /* XXX: add st_T1_A0 ? */
+ gen_op_movl_T0_T1();
+ gen_op_st_T0_A0[ot]();
+ }
+ gen_op_mov_reg_T1[ot][R_EBP]();
+ addend = -esp_addend;
+ if (level1)
+ addend -= opsize * (level1 + 1);
+ gen_op_addl_T1_im(addend);
+ gen_op_mov_reg_T1[ot][R_ESP]();
+}
+
+static void gen_exception(DisasContext *s, int trapno, unsigned int cur_eip)
+{
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ gen_op_jmp_im(cur_eip);
+ gen_op_raise_exception(trapno);
+ s->is_jmp = 1;
+}
+
+/* an interrupt is different from an exception because of the
+ priviledge checks */
+static void gen_interrupt(DisasContext *s, int intno,
+ unsigned int cur_eip, unsigned int next_eip)
+{
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ gen_op_jmp_im(cur_eip);
+ gen_op_raise_interrupt(intno, next_eip);
+ s->is_jmp = 1;
+}
+
+/* generate a jump to eip. No segment change must happen before as a
+ direct call to the next block may occur */
+static void gen_jmp(DisasContext *s, unsigned int eip)
+{
+ TranslationBlock *tb = s->tb;
+
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ gen_op_jmp_tb_next((long)tb, eip);
+ s->is_jmp = 3;
+}
+
/* return the next pc address. Return -1 if no insn found. *is_jmp_ptr
is set to true if the instruction sets the PC (last instruction of
a basic block) */
-long disas_insn(DisasContext *s, uint8_t *pc_start, int *is_jmp_ptr)
+long disas_insn(DisasContext *s, uint8_t *pc_start)
{
int b, prefixes, aflag, dflag;
int shift, ot;
int modrm, reg, rm, mod, reg_addr, op, opreg, offset_addr, val;
+ unsigned int next_eip;
s->pc = pc_start;
prefixes = 0;
- aflag = 1;
- dflag = 1;
- // cur_pc = s->pc; /* for insn generation */
+ aflag = s->code32;
+ dflag = s->code32;
+ s->override = -1;
next_byte:
b = ldub(s->pc);
s->pc++;
prefixes |= PREFIX_LOCK;
goto next_byte;
case 0x2e:
- prefixes |= PREFIX_CS;
+ s->override = R_CS;
goto next_byte;
case 0x36:
- prefixes |= PREFIX_SS;
+ s->override = R_SS;
goto next_byte;
case 0x3e:
- prefixes |= PREFIX_DS;
+ s->override = R_DS;
goto next_byte;
case 0x26:
- prefixes |= PREFIX_ES;
+ s->override = R_ES;
goto next_byte;
case 0x64:
- prefixes |= PREFIX_FS;
+ s->override = R_FS;
goto next_byte;
case 0x65:
- prefixes |= PREFIX_GS;
+ s->override = R_GS;
goto next_byte;
case 0x66:
prefixes |= PREFIX_DATA;
case 0x67:
prefixes |= PREFIX_ADR;
goto next_byte;
- case 0x9b:
- prefixes |= PREFIX_FWAIT;
- goto next_byte;
}
if (prefixes & PREFIX_DATA)
s->aflag = aflag;
s->dflag = dflag;
+ /* lock generation */
+ if (prefixes & PREFIX_LOCK)
+ gen_op_lock();
+
/* now check op code */
reswitch:
switch(b) {
rm = modrm & 7;
if (mod != 3) {
gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
- gen_op_ld_T0_A0[ot]();
opreg = OR_TMP0;
} else {
opreg = OR_EAX + rm;
}
- gen_op(s, op, ot, opreg, reg);
- if (mod != 3 && op != 7) {
- gen_op_st_T0_A0[ot]();
- }
+ gen_op_mov_TN_reg[ot][1][reg]();
+ gen_op(s, op, ot, opreg);
break;
case 1: /* OP Gv, Ev */
modrm = ldub(s->pc++);
if (mod != 3) {
gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
gen_op_ld_T1_A0[ot]();
- opreg = OR_TMP1;
} else {
- opreg = OR_EAX + rm;
+ gen_op_mov_TN_reg[ot][1][rm]();
}
- gen_op(s, op, ot, reg, opreg);
+ gen_op(s, op, ot, reg);
break;
case 2: /* OP A, Iv */
val = insn_get(s, ot);
- gen_opi(s, op, ot, OR_EAX, val);
+ gen_op_movl_T1_im(val);
+ gen_op(s, op, ot, OR_EAX);
break;
}
}
if (mod != 3) {
gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
- gen_op_ld_T0_A0[ot]();
opreg = OR_TMP0;
} else {
opreg = rm + OR_EAX;
val = (int8_t)insn_get(s, OT_BYTE);
break;
}
-
- gen_opi(s, op, ot, opreg, val);
- if (op != 7 && mod != 3) {
- gen_op_st_T0_A0[ot]();
- }
+ gen_op_movl_T1_im(val);
+ gen_op(s, op, ot, opreg);
}
break;
}
break;
case 3: /* neg */
- gen_op_negl_T0_cc();
+ gen_op_negl_T0();
if (mod != 3) {
gen_op_st_T0_A0[ot]();
} else {
gen_op_mov_reg_T0[ot][rm]();
}
+ gen_op_update_neg_cc();
s->cc_op = CC_OP_SUBB + ot;
break;
case 4: /* mul */
case 6: /* div */
switch(ot) {
case OT_BYTE:
- gen_op_divb_AL_T0();
+ gen_op_divb_AL_T0(pc_start - s->cs_base);
break;
case OT_WORD:
- gen_op_divw_AX_T0();
+ gen_op_divw_AX_T0(pc_start - s->cs_base);
break;
default:
case OT_LONG:
- gen_op_divl_EAX_T0();
+ gen_op_divl_EAX_T0(pc_start - s->cs_base);
break;
}
break;
case 7: /* idiv */
switch(ot) {
case OT_BYTE:
- gen_op_idivb_AL_T0();
+ gen_op_idivb_AL_T0(pc_start - s->cs_base);
break;
case OT_WORD:
- gen_op_idivw_AX_T0();
+ gen_op_idivw_AX_T0(pc_start - s->cs_base);
break;
default:
case OT_LONG:
- gen_op_idivl_EAX_T0();
+ gen_op_idivl_EAX_T0(pc_start - s->cs_base);
break;
}
break;
default:
- error("GRP3: bad instruction");
- return -1;
+ goto illegal_op;
}
break;
rm = modrm & 7;
op = (modrm >> 3) & 7;
if (op >= 2 && b == 0xfe) {
- error("GRP4: bad instruction");
- return -1;
+ goto illegal_op;
}
if (mod != 3) {
gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
- gen_op_ld_T0_A0[ot]();
+ if (op >= 2 && op != 3 && op != 5)
+ gen_op_ld_T0_A0[ot]();
} else {
gen_op_mov_TN_reg[ot][0][rm]();
}
switch(op) {
case 0: /* inc Ev */
- gen_inc(s, ot, OR_TMP0, 1);
if (mod != 3)
- gen_op_st_T0_A0[ot]();
+ opreg = OR_TMP0;
else
- gen_op_mov_reg_T0[ot][rm]();
+ opreg = rm;
+ gen_inc(s, ot, opreg, 1);
break;
case 1: /* dec Ev */
- gen_inc(s, ot, OR_TMP0, -1);
if (mod != 3)
- gen_op_st_T0_A0[ot]();
+ opreg = OR_TMP0;
else
- gen_op_mov_reg_T0[ot][rm]();
+ opreg = rm;
+ gen_inc(s, ot, opreg, -1);
break;
case 2: /* call Ev */
- gen_op_movl_T1_im((long)s->pc);
- gen_op_pushl_T1();
+ /* XXX: optimize if memory (no and is necessary) */
+ if (s->dflag == 0)
+ gen_op_andl_T0_ffff();
gen_op_jmp_T0();
- *is_jmp_ptr = 1;
+ next_eip = s->pc - s->cs_base;
+ gen_op_movl_T0_im(next_eip);
+ gen_push_T0(s);
+ s->is_jmp = 1;
+ break;
+ case 3: /* lcall Ev */
+ /* push return segment + offset */
+ gen_op_movl_T0_seg(R_CS);
+ gen_push_T0(s);
+ next_eip = s->pc - s->cs_base;
+ gen_op_movl_T0_im(next_eip);
+ gen_push_T0(s);
+
+ gen_op_ld_T1_A0[ot]();
+ gen_op_addl_A0_im(1 << (ot - OT_WORD + 1));
+ gen_op_lduw_T0_A0();
+ gen_movl_seg_T0(s, R_CS, pc_start - s->cs_base);
+ gen_op_movl_T0_T1();
+ gen_op_jmp_T0();
+ s->is_jmp = 1;
break;
case 4: /* jmp Ev */
+ if (s->dflag == 0)
+ gen_op_andl_T0_ffff();
gen_op_jmp_T0();
- *is_jmp_ptr = 1;
+ s->is_jmp = 1;
+ break;
+ case 5: /* ljmp Ev */
+ gen_op_ld_T1_A0[ot]();
+ gen_op_addl_A0_im(1 << (ot - OT_WORD + 1));
+ gen_op_lduw_T0_A0();
+ if (!s->vm86) {
+ /* we compute EIP to handle the exception case */
+ gen_op_jmp_im(pc_start - s->cs_base);
+ gen_op_ljmp_T0_T1();
+ } else {
+ gen_op_movl_seg_T0_vm(offsetof(CPUX86State,segs[R_CS]));
+ gen_op_movl_T0_T1();
+ gen_op_jmp_T0();
+ }
+ s->is_jmp = 1;
break;
case 6: /* push Ev */
- gen_op_pushl_T0();
+ gen_push_T0(s);
break;
default:
- error("GRP5: bad instruction");
- return -1;
+ goto illegal_op;
}
break;
gen_op_mov_reg_T0[ot][reg]();
s->cc_op = CC_OP_MUL;
break;
+ case 0x1c0:
+ case 0x1c1: /* xadd Ev, Gv */
+ if ((b & 1) == 0)
+ ot = OT_BYTE;
+ else
+ ot = dflag ? OT_LONG : OT_WORD;
+ modrm = ldub(s->pc++);
+ reg = (modrm >> 3) & 7;
+ mod = (modrm >> 6) & 3;
+ if (mod == 3) {
+ rm = modrm & 7;
+ gen_op_mov_TN_reg[ot][0][reg]();
+ gen_op_mov_TN_reg[ot][1][rm]();
+ gen_op_addl_T0_T1();
+ gen_op_mov_reg_T0[ot][rm]();
+ gen_op_mov_reg_T1[ot][reg]();
+ } else {
+ gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
+ gen_op_mov_TN_reg[ot][0][reg]();
+ gen_op_ld_T1_A0[ot]();
+ gen_op_addl_T0_T1();
+ gen_op_st_T0_A0[ot]();
+ gen_op_mov_reg_T1[ot][reg]();
+ }
+ gen_op_update2_cc();
+ s->cc_op = CC_OP_ADDB + ot;
+ break;
+ case 0x1b0:
+ case 0x1b1: /* cmpxchg Ev, Gv */
+ if ((b & 1) == 0)
+ ot = OT_BYTE;
+ else
+ ot = dflag ? OT_LONG : OT_WORD;
+ modrm = ldub(s->pc++);
+ reg = (modrm >> 3) & 7;
+ mod = (modrm >> 6) & 3;
+ gen_op_mov_TN_reg[ot][1][reg]();
+ if (mod == 3) {
+ rm = modrm & 7;
+ gen_op_mov_TN_reg[ot][0][rm]();
+ gen_op_cmpxchg_T0_T1_EAX_cc[ot]();
+ gen_op_mov_reg_T0[ot][rm]();
+ } else {
+ gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
+ gen_op_ld_T0_A0[ot]();
+ gen_op_cmpxchg_T0_T1_EAX_cc[ot]();
+ gen_op_st_T0_A0[ot]();
+ }
+ s->cc_op = CC_OP_SUBB + ot;
+ break;
+ case 0x1c7: /* cmpxchg8b */
+ modrm = ldub(s->pc++);
+ mod = (modrm >> 6) & 3;
+ if (mod == 3)
+ goto illegal_op;
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
+ gen_op_cmpxchg8b();
+ s->cc_op = CC_OP_EFLAGS;
+ break;
/**************************/
/* push/pop */
case 0x50 ... 0x57: /* push */
gen_op_mov_TN_reg[OT_LONG][0][b & 7]();
- gen_op_pushl_T0();
+ gen_push_T0(s);
break;
case 0x58 ... 0x5f: /* pop */
- gen_op_popl_T0();
- gen_op_mov_reg_T0[OT_LONG][b & 7]();
+ ot = dflag ? OT_LONG : OT_WORD;
+ gen_pop_T0(s);
+ gen_op_mov_reg_T0[ot][b & 7]();
+ gen_pop_update(s);
break;
case 0x60: /* pusha */
- if (s->dflag)
- gen_op_pushal();
- else
- gen_op_pushaw();
+ gen_pusha(s);
break;
case 0x61: /* popa */
- if (s->dflag)
- gen_op_popal();
- else
- gen_op_popaw();
+ gen_popa(s);
break;
case 0x68: /* push Iv */
case 0x6a:
else
val = (int8_t)insn_get(s, OT_BYTE);
gen_op_movl_T0_im(val);
- gen_op_pushl_T0();
+ gen_push_T0(s);
break;
case 0x8f: /* pop Ev */
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
- gen_op_popl_T0();
+ gen_pop_T0(s);
+ s->popl_esp_hack = 1;
gen_ldst_modrm(s, modrm, ot, OR_TMP0, 1);
+ s->popl_esp_hack = 0;
+ gen_pop_update(s);
break;
case 0xc8: /* enter */
{
val = lduw(s->pc);
s->pc += 2;
level = ldub(s->pc++);
- level &= 0x1f;
- gen_op_enterl(val, level);
+ gen_enter(s, val, level);
}
break;
case 0xc9: /* leave */
- gen_op_mov_TN_reg[OT_LONG][0][R_EBP]();
- gen_op_mov_reg_T0[OT_LONG][R_ESP]();
- gen_op_popl_T0();
- gen_op_mov_reg_T0[OT_LONG][R_EBP]();
+ /* XXX: exception not precise (ESP is updated before potential exception) */
+ if (s->ss32) {
+ gen_op_mov_TN_reg[OT_LONG][0][R_EBP]();
+ gen_op_mov_reg_T0[OT_LONG][R_ESP]();
+ } else {
+ gen_op_mov_TN_reg[OT_WORD][0][R_EBP]();
+ gen_op_mov_reg_T0[OT_WORD][R_ESP]();
+ }
+ gen_pop_T0(s);
+ ot = dflag ? OT_LONG : OT_WORD;
+ gen_op_mov_reg_T0[ot][R_EBP]();
+ gen_pop_update(s);
break;
+ case 0x06: /* push es */
+ case 0x0e: /* push cs */
+ case 0x16: /* push ss */
+ case 0x1e: /* push ds */
+ gen_op_movl_T0_seg(b >> 3);
+ gen_push_T0(s);
+ break;
+ case 0x1a0: /* push fs */
+ case 0x1a8: /* push gs */
+ gen_op_movl_T0_seg((b >> 3) & 7);
+ gen_push_T0(s);
+ break;
+ case 0x07: /* pop es */
+ case 0x17: /* pop ss */
+ case 0x1f: /* pop ds */
+ gen_pop_T0(s);
+ gen_movl_seg_T0(s, b >> 3, pc_start - s->cs_base);
+ gen_pop_update(s);
+ break;
+ case 0x1a1: /* pop fs */
+ case 0x1a9: /* pop gs */
+ gen_pop_T0(s);
+ gen_movl_seg_T0(s, (b >> 3) & 7, pc_start - s->cs_base);
+ gen_pop_update(s);
+ break;
+
/**************************/
/* mov */
case 0x88:
gen_ldst_modrm(s, modrm, ot, OR_TMP0, 0);
gen_op_mov_reg_T0[ot][reg]();
break;
+ case 0x8e: /* mov seg, Gv */
+ ot = dflag ? OT_LONG : OT_WORD;
+ modrm = ldub(s->pc++);
+ reg = (modrm >> 3) & 7;
+ gen_ldst_modrm(s, modrm, ot, OR_TMP0, 0);
+ if (reg >= 6 || reg == R_CS)
+ goto illegal_op;
+ gen_movl_seg_T0(s, reg, pc_start - s->cs_base);
+ break;
+ case 0x8c: /* mov Gv, seg */
+ ot = dflag ? OT_LONG : OT_WORD;
+ modrm = ldub(s->pc++);
+ reg = (modrm >> 3) & 7;
+ if (reg >= 6)
+ goto illegal_op;
+ gen_op_movl_T0_seg(reg);
+ gen_ldst_modrm(s, modrm, ot, OR_TMP0, 1);
+ break;
case 0x1b6: /* movzbS Gv, Eb */
case 0x1b7: /* movzwS Gv, Eb */
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
-
+ /* we must ensure that no segment is added */
+ s->override = -1;
+ val = s->addseg;
+ s->addseg = 0;
gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
+ s->addseg = val;
gen_op_mov_reg_A0[ot - OT_WORD][reg]();
break;
else
offset_addr = insn_get(s, OT_WORD);
gen_op_movl_A0_im(offset_addr);
+ /* handle override */
+ {
+ int override, must_add_seg;
+ must_add_seg = s->addseg;
+ if (s->override >= 0) {
+ override = s->override;
+ must_add_seg = 1;
+ } else {
+ override = R_DS;
+ }
+ if (must_add_seg) {
+ gen_op_addl_A0_seg(offsetof(CPUX86State,segs[override].base));
+ }
+ }
if ((b & 2) == 0) {
gen_op_ld_T0_A0[ot]();
gen_op_mov_reg_T0[ot][R_EAX]();
gen_op_st_T0_A0[ot]();
}
break;
-
+ case 0xd7: /* xlat */
+ gen_op_movl_A0_reg[R_EBX]();
+ gen_op_addl_A0_AL();
+ if (s->aflag == 0)
+ gen_op_andl_A0_ffff();
+ /* handle override */
+ {
+ int override, must_add_seg;
+ must_add_seg = s->addseg;
+ override = R_DS;
+ if (s->override >= 0) {
+ override = s->override;
+ must_add_seg = 1;
+ } else {
+ override = R_DS;
+ }
+ if (must_add_seg) {
+ gen_op_addl_A0_seg(offsetof(CPUX86State,segs[override].base));
+ }
+ }
+ gen_op_ldub_T0_A0();
+ gen_op_mov_reg_T0[OT_BYTE][R_EAX]();
+ break;
case 0xb0 ... 0xb7: /* mov R, Ib */
val = insn_get(s, OT_BYTE);
gen_op_movl_T0_im(val);
case 0x91 ... 0x97: /* xchg R, EAX */
ot = dflag ? OT_LONG : OT_WORD;
reg = b & 7;
- gen_op_mov_TN_reg[ot][0][reg]();
- gen_op_mov_TN_reg[ot][1][R_EAX]();
- gen_op_mov_reg_T0[ot][R_EAX]();
- gen_op_mov_reg_T1[ot][reg]();
- break;
+ rm = R_EAX;
+ goto do_xchg_reg;
case 0x86:
case 0x87: /* xchg Ev, Gv */
if ((b & 1) == 0)
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
-
+ mod = (modrm >> 6) & 3;
+ if (mod == 3) {
+ rm = modrm & 7;
+ do_xchg_reg:
+ gen_op_mov_TN_reg[ot][0][reg]();
+ gen_op_mov_TN_reg[ot][1][rm]();
+ gen_op_mov_reg_T0[ot][rm]();
+ gen_op_mov_reg_T1[ot][reg]();
+ } else {
+ gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
+ gen_op_mov_TN_reg[ot][0][reg]();
+ /* for xchg, lock is implicit */
+ if (!(prefixes & PREFIX_LOCK))
+ gen_op_lock();
+ gen_op_ld_T1_A0[ot]();
+ gen_op_st_T0_A0[ot]();
+ if (!(prefixes & PREFIX_LOCK))
+ gen_op_unlock();
+ gen_op_mov_reg_T1[ot][reg]();
+ }
+ break;
+ case 0xc4: /* les Gv */
+ op = R_ES;
+ goto do_lxx;
+ case 0xc5: /* lds Gv */
+ op = R_DS;
+ goto do_lxx;
+ case 0x1b2: /* lss Gv */
+ op = R_SS;
+ goto do_lxx;
+ case 0x1b4: /* lfs Gv */
+ op = R_FS;
+ goto do_lxx;
+ case 0x1b5: /* lgs Gv */
+ op = R_GS;
+ do_lxx:
+ ot = dflag ? OT_LONG : OT_WORD;
+ modrm = ldub(s->pc++);
+ reg = (modrm >> 3) & 7;
+ mod = (modrm >> 6) & 3;
+ if (mod == 3)
+ goto illegal_op;
gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
- gen_op_mov_TN_reg[ot][0][reg]();
gen_op_ld_T1_A0[ot]();
- gen_op_st_T0_A0[ot]();
+ gen_op_addl_A0_im(1 << (ot - OT_WORD + 1));
+ /* load the segment first to handle exceptions properly */
+ gen_op_lduw_T0_A0();
+ gen_movl_seg_T0(s, op, pc_start - s->cs_base);
+ /* then put the data */
gen_op_mov_reg_T1[ot][reg]();
break;
break;
}
break;
+ case 0x0c: /* fldenv mem */
+ gen_op_fldenv_A0(s->dflag);
+ break;
case 0x0d: /* fldcw mem */
gen_op_fldcw_A0();
break;
+ case 0x0e: /* fnstenv mem */
+ gen_op_fnstenv_A0(s->dflag);
+ break;
case 0x0f: /* fnstcw mem */
gen_op_fnstcw_A0();
break;
gen_op_fstt_ST0_A0();
gen_op_fpop();
break;
+ case 0x2c: /* frstor mem */
+ gen_op_frstor_A0(s->dflag);
+ break;
+ case 0x2e: /* fnsave mem */
+ gen_op_fnsave_A0(s->dflag);
+ break;
case 0x2f: /* fnstsw mem */
gen_op_fnstsw_A0();
break;
gen_op_fpop();
break;
default:
- error("unhandled FPm [op=0x%02x]\n", op);
- return -1;
+ goto illegal_op;
}
} else {
/* register float ops */
case 0: /* fnop */
break;
default:
- error("unhandled FP GRP d9/2\n");
- return -1;
+ goto illegal_op;
}
break;
case 0x0c: /* grp d9/4 */
gen_op_fxam_ST0();
break;
default:
- return -1;
+ goto illegal_op;
}
break;
case 0x0d: /* grp d9/5 */
gen_op_fldz_ST0();
break;
default:
- return -1;
+ goto illegal_op;
}
}
break;
gen_op_fpop();
break;
default:
- return -1;
+ goto illegal_op;
}
break;
+ case 0x1c:
+ switch(rm) {
+ case 0: /* feni (287 only, just do nop here) */
+ break;
+ case 1: /* fdisi (287 only, just do nop here) */
+ break;
+ case 2: /* fclex */
+ gen_op_fclex();
+ break;
+ case 3: /* fninit */
+ gen_op_fninit();
+ break;
+ case 4: /* fsetpm (287 only, just do nop here) */
+ break;
+ default:
+ goto illegal_op;
+ }
+ break;
+ case 0x1d: /* fucomi */
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ gen_op_fmov_FT0_STN(opreg);
+ gen_op_fucomi_ST0_FT0();
+ s->cc_op = CC_OP_EFLAGS;
+ break;
+ case 0x1e: /* fcomi */
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ gen_op_fmov_FT0_STN(opreg);
+ gen_op_fcomi_ST0_FT0();
+ s->cc_op = CC_OP_EFLAGS;
+ break;
case 0x2a: /* fst sti */
gen_op_fmov_STN_ST0(opreg);
break;
gen_op_fpop();
break;
default:
- return -1;
+ goto illegal_op;
}
break;
case 0x3c: /* df/4 */
gen_op_fnstsw_EAX();
break;
default:
- error("unhandled FP %x df/4\n", rm);
- return -1;
+ goto illegal_op;
}
break;
+ case 0x3d: /* fucomip */
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ gen_op_fmov_FT0_STN(opreg);
+ gen_op_fucomi_ST0_FT0();
+ gen_op_fpop();
+ s->cc_op = CC_OP_EFLAGS;
+ break;
+ case 0x3e: /* fcomip */
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ gen_op_fmov_FT0_STN(opreg);
+ gen_op_fcomi_ST0_FT0();
+ gen_op_fpop();
+ s->cc_op = CC_OP_EFLAGS;
+ break;
default:
- error("unhandled FPr [op=0x%x]\n", op);
- return -1;
+ goto illegal_op;
}
}
break;
/************************/
/* string ops */
+
case 0xa4: /* movsS */
case 0xa5:
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
+
if (prefixes & PREFIX_REPZ) {
- gen_op_movs[3 + ot]();
+ gen_string_ds(s, ot, gen_op_movs + 9);
} else {
- gen_op_movs[ot]();
+ gen_string_ds(s, ot, gen_op_movs);
}
break;
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
+
if (prefixes & PREFIX_REPZ) {
- gen_op_stos[3 + ot]();
+ gen_string_es(s, ot, gen_op_stos + 9);
} else {
- gen_op_stos[ot]();
+ gen_string_es(s, ot, gen_op_stos);
}
break;
case 0xac: /* lodsS */
else
ot = dflag ? OT_LONG : OT_WORD;
if (prefixes & PREFIX_REPZ) {
- gen_op_lods[3 + ot]();
+ gen_string_ds(s, ot, gen_op_lods + 9);
} else {
- gen_op_lods[ot]();
+ gen_string_ds(s, ot, gen_op_lods);
}
break;
case 0xae: /* scasS */
if ((b & 1) == 0)
ot = OT_BYTE;
else
- ot = dflag ? OT_LONG : OT_WORD;
+ ot = dflag ? OT_LONG : OT_WORD;
if (prefixes & PREFIX_REPNZ) {
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
- gen_op_scas[6 + ot]();
+ gen_string_es(s, ot, gen_op_scas + 9 * 2);
s->cc_op = CC_OP_DYNAMIC; /* cannot predict flags after */
} else if (prefixes & PREFIX_REPZ) {
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
- gen_op_scas[3 + ot]();
+ gen_string_es(s, ot, gen_op_scas + 9);
s->cc_op = CC_OP_DYNAMIC; /* cannot predict flags after */
} else {
- gen_op_scas[ot]();
+ gen_string_es(s, ot, gen_op_scas);
s->cc_op = CC_OP_SUBB + ot;
}
break;
if (prefixes & PREFIX_REPNZ) {
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
- gen_op_cmps[6 + ot]();
+ gen_string_ds(s, ot, gen_op_cmps + 9 * 2);
s->cc_op = CC_OP_DYNAMIC; /* cannot predict flags after */
} else if (prefixes & PREFIX_REPZ) {
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
- gen_op_cmps[3 + ot]();
+ gen_string_ds(s, ot, gen_op_cmps + 9);
s->cc_op = CC_OP_DYNAMIC; /* cannot predict flags after */
} else {
- gen_op_cmps[ot]();
+ gen_string_ds(s, ot, gen_op_cmps);
s->cc_op = CC_OP_SUBB + ot;
}
break;
-
- /************************/
- /* port I/O */
case 0x6c: /* insS */
case 0x6d:
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
- if (prefixes & PREFIX_REPZ) {
- gen_op_ins[3 + ot]();
+ if (s->cpl > s->iopl || s->vm86) {
+ /* NOTE: even for (E)CX = 0 the exception is raised */
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
} else {
- gen_op_ins[ot]();
+ if ((b & 1) == 0)
+ ot = OT_BYTE;
+ else
+ ot = dflag ? OT_LONG : OT_WORD;
+ if (prefixes & PREFIX_REPZ) {
+ gen_string_es(s, ot, gen_op_ins + 9);
+ } else {
+ gen_string_es(s, ot, gen_op_ins);
+ }
}
break;
case 0x6e: /* outsS */
case 0x6f:
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
- if (prefixes & PREFIX_REPZ) {
- gen_op_outs[3 + ot]();
+ if (s->cpl > s->iopl || s->vm86) {
+ /* NOTE: even for (E)CX = 0 the exception is raised */
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
} else {
- gen_op_outs[ot]();
+ if ((b & 1) == 0)
+ ot = OT_BYTE;
+ else
+ ot = dflag ? OT_LONG : OT_WORD;
+ if (prefixes & PREFIX_REPZ) {
+ gen_string_ds(s, ot, gen_op_outs + 9);
+ } else {
+ gen_string_ds(s, ot, gen_op_outs);
+ }
}
break;
+
+ /************************/
+ /* port I/O */
case 0xe4:
case 0xe5:
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
- val = ldub(s->pc++);
- gen_op_movl_T0_im(val);
- gen_op_in[ot]();
- gen_op_mov_reg_T1[ot][R_EAX]();
+ if (s->cpl > s->iopl || s->vm86) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ if ((b & 1) == 0)
+ ot = OT_BYTE;
+ else
+ ot = dflag ? OT_LONG : OT_WORD;
+ val = ldub(s->pc++);
+ gen_op_movl_T0_im(val);
+ gen_op_in[ot]();
+ gen_op_mov_reg_T1[ot][R_EAX]();
+ }
break;
case 0xe6:
case 0xe7:
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
- val = ldub(s->pc++);
- gen_op_movl_T0_im(val);
- gen_op_mov_TN_reg[ot][1][R_EAX]();
- gen_op_out[ot]();
+ if (s->cpl > s->iopl || s->vm86) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ if ((b & 1) == 0)
+ ot = OT_BYTE;
+ else
+ ot = dflag ? OT_LONG : OT_WORD;
+ val = ldub(s->pc++);
+ gen_op_movl_T0_im(val);
+ gen_op_mov_TN_reg[ot][1][R_EAX]();
+ gen_op_out[ot]();
+ }
break;
case 0xec:
case 0xed:
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
- gen_op_mov_TN_reg[OT_WORD][0][R_EDX]();
- gen_op_in[ot]();
- gen_op_mov_reg_T1[ot][R_EAX]();
+ if (s->cpl > s->iopl || s->vm86) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ if ((b & 1) == 0)
+ ot = OT_BYTE;
+ else
+ ot = dflag ? OT_LONG : OT_WORD;
+ gen_op_mov_TN_reg[OT_WORD][0][R_EDX]();
+ gen_op_in[ot]();
+ gen_op_mov_reg_T1[ot][R_EAX]();
+ }
break;
case 0xee:
case 0xef:
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
- gen_op_mov_TN_reg[OT_WORD][0][R_EDX]();
- gen_op_mov_TN_reg[ot][1][R_EAX]();
- gen_op_out[ot]();
+ if (s->cpl > s->iopl || s->vm86) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ if ((b & 1) == 0)
+ ot = OT_BYTE;
+ else
+ ot = dflag ? OT_LONG : OT_WORD;
+ gen_op_mov_TN_reg[OT_WORD][0][R_EDX]();
+ gen_op_mov_TN_reg[ot][1][R_EAX]();
+ gen_op_out[ot]();
+ }
break;
/************************/
/* control */
case 0xc2: /* ret im */
- /* XXX: handle stack pop ? */
val = ldsw(s->pc);
s->pc += 2;
- gen_op_popl_T0();
- gen_op_addl_ESP_im(val);
+ gen_pop_T0(s);
+ gen_stack_update(s, val + (2 << s->dflag));
+ if (s->dflag == 0)
+ gen_op_andl_T0_ffff();
gen_op_jmp_T0();
- *is_jmp_ptr = 1;
+ s->is_jmp = 1;
break;
case 0xc3: /* ret */
- gen_op_popl_T0();
+ gen_pop_T0(s);
+ gen_pop_update(s);
+ if (s->dflag == 0)
+ gen_op_andl_T0_ffff();
gen_op_jmp_T0();
- *is_jmp_ptr = 1;
+ s->is_jmp = 1;
+ break;
+ case 0xca: /* lret im */
+ val = ldsw(s->pc);
+ s->pc += 2;
+ do_lret:
+ gen_stack_A0(s);
+ /* pop offset */
+ gen_op_ld_T0_A0[1 + s->dflag]();
+ if (s->dflag == 0)
+ gen_op_andl_T0_ffff();
+ /* NOTE: keeping EIP updated is not a problem in case of
+ exception */
+ gen_op_jmp_T0();
+ /* pop selector */
+ gen_op_addl_A0_im(2 << s->dflag);
+ gen_op_ld_T0_A0[1 + s->dflag]();
+ gen_movl_seg_T0(s, R_CS, pc_start - s->cs_base);
+ /* add stack offset */
+ gen_stack_update(s, val + (4 << s->dflag));
+ s->is_jmp = 1;
+ break;
+ case 0xcb: /* lret */
+ val = 0;
+ goto do_lret;
+ case 0xcf: /* iret */
+ if (s->vm86 && s->iopl != 3) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ gen_op_jmp_im(pc_start - s->cs_base);
+ gen_op_iret_protected(s->dflag);
+ s->cc_op = CC_OP_EFLAGS;
+ }
+ s->is_jmp = 1;
+ break;
+ case 0xe8: /* call im */
+ {
+ unsigned int next_eip;
+ ot = dflag ? OT_LONG : OT_WORD;
+ val = insn_get(s, ot);
+ next_eip = s->pc - s->cs_base;
+ val += next_eip;
+ if (s->dflag == 0)
+ val &= 0xffff;
+ gen_op_movl_T0_im(next_eip);
+ gen_push_T0(s);
+ gen_jmp(s, val);
+ }
break;
- case 0xe8: /* call */
- val = insn_get(s, OT_LONG);
- val += (long)s->pc;
- gen_op_movl_T1_im((long)s->pc);
- gen_op_pushl_T1();
- gen_op_jmp_im(val);
- *is_jmp_ptr = 1;
+ case 0x9a: /* lcall im */
+ {
+ unsigned int selector, offset;
+ /* XXX: not restartable */
+
+ ot = dflag ? OT_LONG : OT_WORD;
+ offset = insn_get(s, ot);
+ selector = insn_get(s, OT_WORD);
+
+ /* push return segment + offset */
+ gen_op_movl_T0_seg(R_CS);
+ gen_push_T0(s);
+ next_eip = s->pc - s->cs_base;
+ gen_op_movl_T0_im(next_eip);
+ gen_push_T0(s);
+
+ /* change cs and pc */
+ gen_op_movl_T0_im(selector);
+ gen_movl_seg_T0(s, R_CS, pc_start - s->cs_base);
+ gen_op_jmp_im((unsigned long)offset);
+ s->is_jmp = 1;
+ }
break;
case 0xe9: /* jmp */
- val = insn_get(s, OT_LONG);
- val += (long)s->pc;
- gen_op_jmp_im(val);
- *is_jmp_ptr = 1;
+ ot = dflag ? OT_LONG : OT_WORD;
+ val = insn_get(s, ot);
+ val += s->pc - s->cs_base;
+ if (s->dflag == 0)
+ val = val & 0xffff;
+ gen_jmp(s, val);
+ break;
+ case 0xea: /* ljmp im */
+ {
+ unsigned int selector, offset;
+
+ ot = dflag ? OT_LONG : OT_WORD;
+ offset = insn_get(s, ot);
+ selector = insn_get(s, OT_WORD);
+
+ /* change cs and pc */
+ gen_op_movl_T0_im(selector);
+ if (!s->vm86) {
+ /* we compute EIP to handle the exception case */
+ gen_op_jmp_im(pc_start - s->cs_base);
+ gen_op_movl_T1_im(offset);
+ gen_op_ljmp_T0_T1();
+ } else {
+ gen_op_movl_seg_T0_vm(offsetof(CPUX86State,segs[R_CS]));
+ gen_op_jmp_im((unsigned long)offset);
+ }
+ s->is_jmp = 1;
+ }
break;
case 0xeb: /* jmp Jb */
val = (int8_t)insn_get(s, OT_BYTE);
- val += (long)s->pc;
- gen_op_jmp_im(val);
- *is_jmp_ptr = 1;
+ val += s->pc - s->cs_base;
+ if (s->dflag == 0)
+ val = val & 0xffff;
+ gen_jmp(s, val);
break;
case 0x70 ... 0x7f: /* jcc Jb */
val = (int8_t)insn_get(s, OT_BYTE);
- val += (long)s->pc;
goto do_jcc;
case 0x180 ... 0x18f: /* jcc Jv */
if (dflag) {
} else {
val = (int16_t)insn_get(s, OT_WORD);
}
- val += (long)s->pc; /* XXX: fix 16 bit wrap */
do_jcc:
- gen_jcc(s, b, val);
- *is_jmp_ptr = 1;
+ next_eip = s->pc - s->cs_base;
+ val += next_eip;
+ if (s->dflag == 0)
+ val &= 0xffff;
+ gen_jcc(s, b, val, next_eip);
break;
- case 0x190 ... 0x19f:
+ case 0x190 ... 0x19f: /* setcc Gv */
modrm = ldub(s->pc++);
gen_setcc(s, b);
gen_ldst_modrm(s, modrm, OT_BYTE, OR_TMP0, 1);
break;
-
+ case 0x140 ... 0x14f: /* cmov Gv, Ev */
+ ot = dflag ? OT_LONG : OT_WORD;
+ modrm = ldub(s->pc++);
+ reg = (modrm >> 3) & 7;
+ mod = (modrm >> 6) & 3;
+ gen_setcc(s, b);
+ if (mod != 3) {
+ gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
+ gen_op_ld_T1_A0[ot]();
+ } else {
+ rm = modrm & 7;
+ gen_op_mov_TN_reg[ot][1][rm]();
+ }
+ gen_op_cmov_reg_T1_T0[ot - OT_WORD][reg]();
+ break;
+
/************************/
/* flags */
case 0x9c: /* pushf */
- if (s->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(s->cc_op);
- gen_op_movl_T0_eflags();
- gen_op_pushl_T0();
+ if (s->vm86 && s->iopl != 3) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ gen_op_movl_T0_eflags();
+ gen_push_T0(s);
+ }
break;
case 0x9d: /* popf */
- gen_op_popl_T0();
- gen_op_movl_eflags_T0();
- s->cc_op = CC_OP_EFLAGS;
+ if (s->vm86 && s->iopl != 3) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ gen_pop_T0(s);
+ if (s->cpl == 0) {
+ if (s->dflag) {
+ gen_op_movl_eflags_T0_cpl0();
+ } else {
+ gen_op_movw_eflags_T0_cpl0();
+ }
+ } else {
+ if (s->dflag) {
+ gen_op_movl_eflags_T0();
+ } else {
+ gen_op_movw_eflags_T0();
+ }
+ }
+ gen_pop_update(s);
+ s->cc_op = CC_OP_EFLAGS;
+ s->is_jmp = 2; /* abort translation because TF flag may change */
+ }
break;
case 0x9e: /* sahf */
gen_op_mov_TN_reg[OT_BYTE][0][R_AH]();
val = ldub(s->pc++);
gen_op_movl_T1_im(val);
if (op < 4)
- return -1;
+ goto illegal_op;
op -= 4;
gen_op_btx_T0_T1_cc[ot - OT_WORD][op]();
s->cc_op = CC_OP_SARB + ot;
/* misc */
case 0x90: /* nop */
break;
+ case 0x9b: /* fwait */
+ break;
case 0xcc: /* int3 */
- gen_op_int3((long)pc_start);
- *is_jmp_ptr = 1;
+ gen_interrupt(s, EXCP03_INT3, pc_start - s->cs_base, s->pc - s->cs_base);
break;
case 0xcd: /* int N */
val = ldub(s->pc++);
- /* XXX: currently we ignore the interrupt number */
- gen_op_int_im((long)pc_start);
- *is_jmp_ptr = 1;
+ /* XXX: add error code for vm86 GPF */
+ if (!s->vm86)
+ gen_interrupt(s, val, pc_start - s->cs_base, s->pc - s->cs_base);
+ else
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
break;
case 0xce: /* into */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
- gen_op_into((long)pc_start, (long)s->pc);
- *is_jmp_ptr = 1;
+ gen_op_into(s->pc - s->cs_base);
+ break;
+ case 0xfa: /* cli */
+ if (!s->vm86) {
+ if (s->cpl <= s->iopl) {
+ gen_op_cli();
+ } else {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ }
+ } else {
+ if (s->iopl == 3) {
+ gen_op_cli();
+ } else {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ }
+ }
+ break;
+ case 0xfb: /* sti */
+ if (!s->vm86) {
+ if (s->cpl <= s->iopl) {
+ gen_op_sti();
+ s->is_jmp = 2; /* give a chance to handle pending irqs */
+ } else {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ }
+ } else {
+ if (s->iopl == 3) {
+ gen_op_sti();
+ s->is_jmp = 2; /* give a chance to handle pending irqs */
+ } else {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ }
+ }
+ break;
+ case 0x62: /* bound */
+ ot = dflag ? OT_LONG : OT_WORD;
+ modrm = ldub(s->pc++);
+ reg = (modrm >> 3) & 7;
+ mod = (modrm >> 6) & 3;
+ if (mod == 3)
+ goto illegal_op;
+ gen_op_mov_reg_T0[ot][reg]();
+ gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
+ if (ot == OT_WORD)
+ gen_op_boundw(pc_start - s->cs_base);
+ else
+ gen_op_boundl(pc_start - s->cs_base);
break;
case 0x1c8 ... 0x1cf: /* bswap reg */
reg = b & 7;
gen_op_set_cc_op(s->cc_op);
gen_op_salc();
break;
- case 0x1a2: /* rdtsc */
+ case 0xe0: /* loopnz */
+ case 0xe1: /* loopz */
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ /* FALL THRU */
+ case 0xe2: /* loop */
+ case 0xe3: /* jecxz */
+ val = (int8_t)insn_get(s, OT_BYTE);
+ next_eip = s->pc - s->cs_base;
+ val += next_eip;
+ if (s->dflag == 0)
+ val &= 0xffff;
+ gen_op_loop[s->aflag][b & 3](val, next_eip);
+ s->is_jmp = 1;
+ break;
+ case 0x131: /* rdtsc */
gen_op_rdtsc();
break;
-#if 0
case 0x1a2: /* cpuid */
- gen_insn0(OP_ASM);
+ gen_op_cpuid();
+ break;
+ case 0xf4: /* hlt */
+ if (s->cpl != 0) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ gen_op_jmp_im(s->pc - s->cs_base);
+ gen_op_hlt();
+ s->is_jmp = 1;
+ }
+ break;
+ case 0x100:
+ modrm = ldub(s->pc++);
+ mod = (modrm >> 6) & 3;
+ op = (modrm >> 3) & 7;
+ switch(op) {
+ case 0: /* sldt */
+ gen_op_movl_T0_env(offsetof(CPUX86State,ldt.selector));
+ ot = OT_WORD;
+ if (mod == 3)
+ ot += s->dflag;
+ gen_ldst_modrm(s, modrm, ot, OR_TMP0, 1);
+ break;
+ case 2: /* lldt */
+ if (s->cpl != 0) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ gen_ldst_modrm(s, modrm, OT_WORD, OR_TMP0, 0);
+ gen_op_jmp_im(pc_start - s->cs_base);
+ gen_op_lldt_T0();
+ }
+ break;
+ case 1: /* str */
+ gen_op_movl_T0_env(offsetof(CPUX86State,tr.selector));
+ ot = OT_WORD;
+ if (mod == 3)
+ ot += s->dflag;
+ gen_ldst_modrm(s, modrm, ot, OR_TMP0, 1);
+ break;
+ case 3: /* ltr */
+ if (s->cpl != 0) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ gen_ldst_modrm(s, modrm, OT_WORD, OR_TMP0, 0);
+ gen_op_jmp_im(pc_start - s->cs_base);
+ gen_op_ltr_T0();
+ }
+ break;
+ case 4: /* verr */
+ case 5: /* verw */
+ default:
+ goto illegal_op;
+ }
+ break;
+ case 0x101:
+ modrm = ldub(s->pc++);
+ mod = (modrm >> 6) & 3;
+ op = (modrm >> 3) & 7;
+ switch(op) {
+ case 0: /* sgdt */
+ case 1: /* sidt */
+ if (mod == 3)
+ goto illegal_op;
+ gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
+ if (op == 0)
+ gen_op_movl_T0_env(offsetof(CPUX86State,gdt.limit));
+ else
+ gen_op_movl_T0_env(offsetof(CPUX86State,idt.limit));
+ gen_op_stw_T0_A0();
+ gen_op_addl_A0_im(2);
+ if (op == 0)
+ gen_op_movl_T0_env(offsetof(CPUX86State,gdt.base));
+ else
+ gen_op_movl_T0_env(offsetof(CPUX86State,idt.base));
+ if (!s->dflag)
+ gen_op_andl_T0_im(0xffffff);
+ gen_op_stl_T0_A0();
+ break;
+ case 2: /* lgdt */
+ case 3: /* lidt */
+ if (mod == 3)
+ goto illegal_op;
+ if (s->cpl != 0) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
+ gen_op_lduw_T1_A0();
+ gen_op_addl_A0_im(2);
+ gen_op_ldl_T0_A0();
+ if (!s->dflag)
+ gen_op_andl_T0_im(0xffffff);
+ if (op == 2) {
+ gen_op_movl_env_T0(offsetof(CPUX86State,gdt.base));
+ gen_op_movl_env_T1(offsetof(CPUX86State,gdt.limit));
+ } else {
+ gen_op_movl_env_T0(offsetof(CPUX86State,idt.base));
+ gen_op_movl_env_T1(offsetof(CPUX86State,idt.limit));
+ }
+ }
+ break;
+ case 4: /* smsw */
+ gen_op_movl_T0_env(offsetof(CPUX86State,cr[0]));
+ gen_ldst_modrm(s, modrm, OT_WORD, OR_TMP0, 1);
+ break;
+ case 6: /* lmsw */
+ if (s->cpl != 0) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ gen_ldst_modrm(s, modrm, OT_WORD, OR_TMP0, 0);
+ gen_op_lmsw_T0();
+ }
+ break;
+ case 7: /* invlpg */
+ if (s->cpl != 0) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ if (mod == 3)
+ goto illegal_op;
+ gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
+ gen_op_invlpg_A0();
+ }
+ break;
+ default:
+ goto illegal_op;
+ }
+ break;
+ case 0x102: /* lar */
+ case 0x103: /* lsl */
+ if (s->vm86)
+ goto illegal_op;
+ ot = dflag ? OT_LONG : OT_WORD;
+ modrm = ldub(s->pc++);
+ reg = (modrm >> 3) & 7;
+ gen_ldst_modrm(s, modrm, ot, OR_TMP0, 0);
+ gen_op_mov_TN_reg[ot][1][reg]();
+ if (s->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(s->cc_op);
+ if (b == 0x102)
+ gen_op_lar();
+ else
+ gen_op_lsl();
+ s->cc_op = CC_OP_EFLAGS;
+ gen_op_mov_reg_T1[ot][reg]();
+ break;
+ case 0x118:
+ modrm = ldub(s->pc++);
+ mod = (modrm >> 6) & 3;
+ op = (modrm >> 3) & 7;
+ switch(op) {
+ case 0: /* prefetchnta */
+ case 1: /* prefetchnt0 */
+ case 2: /* prefetchnt0 */
+ case 3: /* prefetchnt0 */
+ if (mod == 3)
+ goto illegal_op;
+ gen_lea_modrm(s, modrm, ®_addr, &offset_addr);
+ /* nothing more to do */
+ break;
+ default:
+ goto illegal_op;
+ }
+ break;
+ case 0x120: /* mov reg, crN */
+ case 0x122: /* mov crN, reg */
+ if (s->cpl != 0) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ modrm = ldub(s->pc++);
+ if ((modrm & 0xc0) != 0xc0)
+ goto illegal_op;
+ rm = modrm & 7;
+ reg = (modrm >> 3) & 7;
+ switch(reg) {
+ case 0:
+ case 2:
+ case 3:
+ case 4:
+ if (b & 2) {
+ gen_op_mov_TN_reg[OT_LONG][0][rm]();
+ gen_op_movl_crN_T0(reg);
+ s->is_jmp = 2;
+ } else {
+ gen_op_movl_T0_env(offsetof(CPUX86State,cr[reg]));
+ gen_op_mov_reg_T0[OT_LONG][rm]();
+ }
+ break;
+ default:
+ goto illegal_op;
+ }
+ }
+ break;
+ case 0x121: /* mov reg, drN */
+ case 0x123: /* mov drN, reg */
+ if (s->cpl != 0) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ modrm = ldub(s->pc++);
+ if ((modrm & 0xc0) != 0xc0)
+ goto illegal_op;
+ rm = modrm & 7;
+ reg = (modrm >> 3) & 7;
+ /* XXX: do it dynamically with CR4.DE bit */
+ if (reg == 4 || reg == 5)
+ goto illegal_op;
+ if (b & 2) {
+ gen_op_mov_TN_reg[OT_LONG][0][rm]();
+ gen_op_movl_drN_T0(reg);
+ s->is_jmp = 2;
+ } else {
+ gen_op_movl_T0_env(offsetof(CPUX86State,dr[reg]));
+ gen_op_mov_reg_T0[OT_LONG][rm]();
+ }
+ }
+ break;
+ case 0x106: /* clts */
+ if (s->cpl != 0) {
+ gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
+ } else {
+ gen_op_clts();
+ }
break;
-#endif
default:
- error("unknown opcode 0x%x", b);
- return -1;
+ goto illegal_op;
}
+ /* lock generation */
+ if (s->prefix & PREFIX_LOCK)
+ gen_op_unlock();
return (long)s->pc;
+ illegal_op:
+ /* XXX: ensure that no lock was generated */
+ return -1;
}
-/* return the next pc */
-int cpu_x86_gen_code(uint8_t *gen_code_buf, int max_code_size,
- int *gen_code_size_ptr, uint8_t *pc_start)
+#define CC_OSZAPC (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C)
+#define CC_OSZAP (CC_O | CC_S | CC_Z | CC_A | CC_P)
+
+/* flags read by an operation */
+static uint16_t opc_read_flags[NB_OPS] = {
+ [INDEX_op_aas] = CC_A,
+ [INDEX_op_aaa] = CC_A,
+ [INDEX_op_das] = CC_A | CC_C,
+ [INDEX_op_daa] = CC_A | CC_C,
+
+ [INDEX_op_adcb_T0_T1_cc] = CC_C,
+ [INDEX_op_adcw_T0_T1_cc] = CC_C,
+ [INDEX_op_adcl_T0_T1_cc] = CC_C,
+ [INDEX_op_sbbb_T0_T1_cc] = CC_C,
+ [INDEX_op_sbbw_T0_T1_cc] = CC_C,
+ [INDEX_op_sbbl_T0_T1_cc] = CC_C,
+
+ /* subtle: due to the incl/decl implementation, C is used */
+ [INDEX_op_update_inc_cc] = CC_C,
+
+ [INDEX_op_into] = CC_O,
+
+ [INDEX_op_jb_subb] = CC_C,
+ [INDEX_op_jb_subw] = CC_C,
+ [INDEX_op_jb_subl] = CC_C,
+
+ [INDEX_op_jz_subb] = CC_Z,
+ [INDEX_op_jz_subw] = CC_Z,
+ [INDEX_op_jz_subl] = CC_Z,
+
+ [INDEX_op_jbe_subb] = CC_Z | CC_C,
+ [INDEX_op_jbe_subw] = CC_Z | CC_C,
+ [INDEX_op_jbe_subl] = CC_Z | CC_C,
+
+ [INDEX_op_js_subb] = CC_S,
+ [INDEX_op_js_subw] = CC_S,
+ [INDEX_op_js_subl] = CC_S,
+
+ [INDEX_op_jl_subb] = CC_O | CC_S,
+ [INDEX_op_jl_subw] = CC_O | CC_S,
+ [INDEX_op_jl_subl] = CC_O | CC_S,
+
+ [INDEX_op_jle_subb] = CC_O | CC_S | CC_Z,
+ [INDEX_op_jle_subw] = CC_O | CC_S | CC_Z,
+ [INDEX_op_jle_subl] = CC_O | CC_S | CC_Z,
+
+ [INDEX_op_loopnzw] = CC_Z,
+ [INDEX_op_loopnzl] = CC_Z,
+ [INDEX_op_loopzw] = CC_Z,
+ [INDEX_op_loopzl] = CC_Z,
+
+ [INDEX_op_seto_T0_cc] = CC_O,
+ [INDEX_op_setb_T0_cc] = CC_C,
+ [INDEX_op_setz_T0_cc] = CC_Z,
+ [INDEX_op_setbe_T0_cc] = CC_Z | CC_C,
+ [INDEX_op_sets_T0_cc] = CC_S,
+ [INDEX_op_setp_T0_cc] = CC_P,
+ [INDEX_op_setl_T0_cc] = CC_O | CC_S,
+ [INDEX_op_setle_T0_cc] = CC_O | CC_S | CC_Z,
+
+ [INDEX_op_setb_T0_subb] = CC_C,
+ [INDEX_op_setb_T0_subw] = CC_C,
+ [INDEX_op_setb_T0_subl] = CC_C,
+
+ [INDEX_op_setz_T0_subb] = CC_Z,
+ [INDEX_op_setz_T0_subw] = CC_Z,
+ [INDEX_op_setz_T0_subl] = CC_Z,
+
+ [INDEX_op_setbe_T0_subb] = CC_Z | CC_C,
+ [INDEX_op_setbe_T0_subw] = CC_Z | CC_C,
+ [INDEX_op_setbe_T0_subl] = CC_Z | CC_C,
+
+ [INDEX_op_sets_T0_subb] = CC_S,
+ [INDEX_op_sets_T0_subw] = CC_S,
+ [INDEX_op_sets_T0_subl] = CC_S,
+
+ [INDEX_op_setl_T0_subb] = CC_O | CC_S,
+ [INDEX_op_setl_T0_subw] = CC_O | CC_S,
+ [INDEX_op_setl_T0_subl] = CC_O | CC_S,
+
+ [INDEX_op_setle_T0_subb] = CC_O | CC_S | CC_Z,
+ [INDEX_op_setle_T0_subw] = CC_O | CC_S | CC_Z,
+ [INDEX_op_setle_T0_subl] = CC_O | CC_S | CC_Z,
+
+ [INDEX_op_movl_T0_eflags] = CC_OSZAPC,
+ [INDEX_op_cmc] = CC_C,
+ [INDEX_op_salc] = CC_C,
+
+ [INDEX_op_rclb_T0_T1_cc] = CC_C,
+ [INDEX_op_rclw_T0_T1_cc] = CC_C,
+ [INDEX_op_rcll_T0_T1_cc] = CC_C,
+ [INDEX_op_rcrb_T0_T1_cc] = CC_C,
+ [INDEX_op_rcrw_T0_T1_cc] = CC_C,
+ [INDEX_op_rcrl_T0_T1_cc] = CC_C,
+};
+
+/* flags written by an operation */
+static uint16_t opc_write_flags[NB_OPS] = {
+ [INDEX_op_update2_cc] = CC_OSZAPC,
+ [INDEX_op_update1_cc] = CC_OSZAPC,
+ [INDEX_op_adcb_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_adcw_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_adcl_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_sbbb_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_sbbw_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_sbbl_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_cmpl_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_update_neg_cc] = CC_OSZAPC,
+ /* subtle: due to the incl/decl implementation, C is used */
+ [INDEX_op_update_inc_cc] = CC_OSZAPC,
+ [INDEX_op_testl_T0_T1_cc] = CC_OSZAPC,
+
+ [INDEX_op_mulb_AL_T0] = CC_OSZAPC,
+ [INDEX_op_imulb_AL_T0] = CC_OSZAPC,
+ [INDEX_op_mulw_AX_T0] = CC_OSZAPC,
+ [INDEX_op_imulw_AX_T0] = CC_OSZAPC,
+ [INDEX_op_mull_EAX_T0] = CC_OSZAPC,
+ [INDEX_op_imull_EAX_T0] = CC_OSZAPC,
+ [INDEX_op_imulw_T0_T1] = CC_OSZAPC,
+ [INDEX_op_imull_T0_T1] = CC_OSZAPC,
+
+ /* bcd */
+ [INDEX_op_aam] = CC_OSZAPC,
+ [INDEX_op_aad] = CC_OSZAPC,
+ [INDEX_op_aas] = CC_OSZAPC,
+ [INDEX_op_aaa] = CC_OSZAPC,
+ [INDEX_op_das] = CC_OSZAPC,
+ [INDEX_op_daa] = CC_OSZAPC,
+
+ [INDEX_op_movb_eflags_T0] = CC_S | CC_Z | CC_A | CC_P | CC_C,
+ [INDEX_op_movw_eflags_T0] = CC_OSZAPC,
+ [INDEX_op_movl_eflags_T0] = CC_OSZAPC,
+ [INDEX_op_clc] = CC_C,
+ [INDEX_op_stc] = CC_C,
+ [INDEX_op_cmc] = CC_C,
+
+ [INDEX_op_rolb_T0_T1_cc] = CC_O | CC_C,
+ [INDEX_op_rolw_T0_T1_cc] = CC_O | CC_C,
+ [INDEX_op_roll_T0_T1_cc] = CC_O | CC_C,
+ [INDEX_op_rorb_T0_T1_cc] = CC_O | CC_C,
+ [INDEX_op_rorw_T0_T1_cc] = CC_O | CC_C,
+ [INDEX_op_rorl_T0_T1_cc] = CC_O | CC_C,
+
+ [INDEX_op_rclb_T0_T1_cc] = CC_O | CC_C,
+ [INDEX_op_rclw_T0_T1_cc] = CC_O | CC_C,
+ [INDEX_op_rcll_T0_T1_cc] = CC_O | CC_C,
+ [INDEX_op_rcrb_T0_T1_cc] = CC_O | CC_C,
+ [INDEX_op_rcrw_T0_T1_cc] = CC_O | CC_C,
+ [INDEX_op_rcrl_T0_T1_cc] = CC_O | CC_C,
+
+ [INDEX_op_shlb_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_shlw_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_shll_T0_T1_cc] = CC_OSZAPC,
+
+ [INDEX_op_shrb_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_shrw_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_shrl_T0_T1_cc] = CC_OSZAPC,
+
+ [INDEX_op_sarb_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_sarw_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_sarl_T0_T1_cc] = CC_OSZAPC,
+
+ [INDEX_op_shldw_T0_T1_ECX_cc] = CC_OSZAPC,
+ [INDEX_op_shldl_T0_T1_ECX_cc] = CC_OSZAPC,
+ [INDEX_op_shldw_T0_T1_im_cc] = CC_OSZAPC,
+ [INDEX_op_shldl_T0_T1_im_cc] = CC_OSZAPC,
+
+ [INDEX_op_shrdw_T0_T1_ECX_cc] = CC_OSZAPC,
+ [INDEX_op_shrdl_T0_T1_ECX_cc] = CC_OSZAPC,
+ [INDEX_op_shrdw_T0_T1_im_cc] = CC_OSZAPC,
+ [INDEX_op_shrdl_T0_T1_im_cc] = CC_OSZAPC,
+
+ [INDEX_op_btw_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_btl_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_btsw_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_btsl_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_btrw_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_btrl_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_btcw_T0_T1_cc] = CC_OSZAPC,
+ [INDEX_op_btcl_T0_T1_cc] = CC_OSZAPC,
+
+ [INDEX_op_bsfw_T0_cc] = CC_OSZAPC,
+ [INDEX_op_bsfl_T0_cc] = CC_OSZAPC,
+ [INDEX_op_bsrw_T0_cc] = CC_OSZAPC,
+ [INDEX_op_bsrl_T0_cc] = CC_OSZAPC,
+
+#undef STRINGOP
+#define STRINGOP(x) \
+ [INDEX_op_ ## x ## b_fast] = CC_OSZAPC, \
+ [INDEX_op_ ## x ## w_fast] = CC_OSZAPC, \
+ [INDEX_op_ ## x ## l_fast] = CC_OSZAPC, \
+ [INDEX_op_ ## x ## b_a32] = CC_OSZAPC, \
+ [INDEX_op_ ## x ## w_a32] = CC_OSZAPC, \
+ [INDEX_op_ ## x ## l_a32] = CC_OSZAPC, \
+ [INDEX_op_ ## x ## b_a16] = CC_OSZAPC, \
+ [INDEX_op_ ## x ## w_a16] = CC_OSZAPC, \
+ [INDEX_op_ ## x ## l_a16] = CC_OSZAPC,
+
+ STRINGOP(scas)
+ STRINGOP(repz_scas)
+ STRINGOP(repnz_scas)
+ STRINGOP(cmps)
+ STRINGOP(repz_cmps)
+ STRINGOP(repnz_cmps)
+
+ [INDEX_op_cmpxchgb_T0_T1_EAX_cc] = CC_OSZAPC,
+ [INDEX_op_cmpxchgw_T0_T1_EAX_cc] = CC_OSZAPC,
+ [INDEX_op_cmpxchgl_T0_T1_EAX_cc] = CC_OSZAPC,
+
+ [INDEX_op_cmpxchg8b] = CC_Z,
+ [INDEX_op_lar] = CC_Z,
+ [INDEX_op_lsl] = CC_Z,
+ [INDEX_op_fcomi_ST0_FT0] = CC_Z | CC_P | CC_C,
+ [INDEX_op_fucomi_ST0_FT0] = CC_Z | CC_P | CC_C,
+};
+
+/* simpler form of an operation if no flags need to be generated */
+static uint16_t opc_simpler[NB_OPS] = {
+ [INDEX_op_update2_cc] = INDEX_op_nop,
+ [INDEX_op_update1_cc] = INDEX_op_nop,
+ [INDEX_op_update_neg_cc] = INDEX_op_nop,
+ [INDEX_op_update_inc_cc] = INDEX_op_nop,
+
+ [INDEX_op_rolb_T0_T1_cc] = INDEX_op_rolb_T0_T1,
+ [INDEX_op_rolw_T0_T1_cc] = INDEX_op_rolw_T0_T1,
+ [INDEX_op_roll_T0_T1_cc] = INDEX_op_roll_T0_T1,
+
+ [INDEX_op_rorb_T0_T1_cc] = INDEX_op_rorb_T0_T1,
+ [INDEX_op_rorw_T0_T1_cc] = INDEX_op_rorw_T0_T1,
+ [INDEX_op_rorl_T0_T1_cc] = INDEX_op_rorl_T0_T1,
+
+ [INDEX_op_shlb_T0_T1_cc] = INDEX_op_shlb_T0_T1,
+ [INDEX_op_shlw_T0_T1_cc] = INDEX_op_shlw_T0_T1,
+ [INDEX_op_shll_T0_T1_cc] = INDEX_op_shll_T0_T1,
+
+ [INDEX_op_shrb_T0_T1_cc] = INDEX_op_shrb_T0_T1,
+ [INDEX_op_shrw_T0_T1_cc] = INDEX_op_shrw_T0_T1,
+ [INDEX_op_shrl_T0_T1_cc] = INDEX_op_shrl_T0_T1,
+
+ [INDEX_op_sarb_T0_T1_cc] = INDEX_op_sarb_T0_T1,
+ [INDEX_op_sarw_T0_T1_cc] = INDEX_op_sarw_T0_T1,
+ [INDEX_op_sarl_T0_T1_cc] = INDEX_op_sarl_T0_T1,
+};
+
+static void optimize_flags_init(void)
+{
+ int i;
+ /* put default values in arrays */
+ for(i = 0; i < NB_OPS; i++) {
+ if (opc_simpler[i] == 0)
+ opc_simpler[i] = i;
+ }
+}
+
+/* CPU flags computation optimization: we move backward thru the
+ generated code to see which flags are needed. The operation is
+ modified if suitable */
+static void optimize_flags(uint16_t *opc_buf, int opc_buf_len)
+{
+ uint16_t *opc_ptr;
+ int live_flags, write_flags, op;
+
+ opc_ptr = opc_buf + opc_buf_len;
+ /* live_flags contains the flags needed by the next instructions
+ in the code. At the end of the bloc, we consider that all the
+ flags are live. */
+ live_flags = CC_OSZAPC;
+ while (opc_ptr > opc_buf) {
+ op = *--opc_ptr;
+ /* if none of the flags written by the instruction is used,
+ then we can try to find a simpler instruction */
+ write_flags = opc_write_flags[op];
+ if ((live_flags & write_flags) == 0) {
+ *opc_ptr = opc_simpler[op];
+ }
+ /* compute the live flags before the instruction */
+ live_flags &= ~write_flags;
+ live_flags |= opc_read_flags[op];
+ }
+}
+
+/* generate intermediate code in gen_opc_buf and gen_opparam_buf for
+ basic block 'tb'. If search_pc is TRUE, also generate PC
+ information for each intermediate instruction. */
+static inline int gen_intermediate_code_internal(TranslationBlock *tb, int search_pc)
{
DisasContext dc1, *dc = &dc1;
- uint8_t *gen_code_end, *pc_ptr;
- int is_jmp;
+ uint8_t *pc_ptr;
+ uint16_t *gen_opc_end;
+ int flags, j, lj;
long ret;
-#ifdef DEBUG_DISAS
- struct disassemble_info disasm_info;
-#endif
-
+ uint8_t *pc_start;
+ uint8_t *cs_base;
+
+ /* generate intermediate code */
+ pc_start = (uint8_t *)tb->pc;
+ cs_base = (uint8_t *)tb->cs_base;
+ flags = tb->flags;
+
+ dc->code32 = (flags >> GEN_FLAG_CODE32_SHIFT) & 1;
+ dc->ss32 = (flags >> GEN_FLAG_SS32_SHIFT) & 1;
+ dc->addseg = (flags >> GEN_FLAG_ADDSEG_SHIFT) & 1;
+ dc->f_st = (flags >> GEN_FLAG_ST_SHIFT) & 7;
+ dc->vm86 = (flags >> GEN_FLAG_VM_SHIFT) & 1;
+ dc->cpl = (flags >> GEN_FLAG_CPL_SHIFT) & 3;
+ dc->iopl = (flags >> GEN_FLAG_IOPL_SHIFT) & 3;
+ dc->tf = (flags >> GEN_FLAG_TF_SHIFT) & 1;
dc->cc_op = CC_OP_DYNAMIC;
- gen_code_ptr = gen_code_buf;
- gen_code_end = gen_code_buf + max_code_size - 4096;
- gen_start();
+ dc->cs_base = cs_base;
+ dc->tb = tb;
+ dc->popl_esp_hack = 0;
+
+ gen_opc_ptr = gen_opc_buf;
+ gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
+ gen_opparam_ptr = gen_opparam_buf;
- is_jmp = 0;
+ dc->is_jmp = DISAS_NEXT;
pc_ptr = pc_start;
+ lj = -1;
do {
- ret = disas_insn(dc, pc_ptr, &is_jmp);
- if (ret == -1)
- error("unknown instruction at PC=0x%x B=%02x %02x",
- pc_ptr, pc_ptr[0], pc_ptr[1]);
+ if (search_pc) {
+ j = gen_opc_ptr - gen_opc_buf;
+ if (lj < j) {
+ lj++;
+ while (lj < j)
+ gen_opc_instr_start[lj++] = 0;
+ gen_opc_pc[lj] = (uint32_t)pc_ptr;
+ gen_opc_cc_op[lj] = dc->cc_op;
+ gen_opc_instr_start[lj] = 1;
+ }
+ }
+ ret = disas_insn(dc, pc_ptr);
+ if (ret == -1) {
+ /* we trigger an illegal instruction operation only if it
+ is the first instruction. Otherwise, we simply stop
+ generating the code just before it */
+ if (pc_ptr == pc_start)
+ return -1;
+ else
+ break;
+ }
pc_ptr = (void *)ret;
- } while (!is_jmp && gen_code_ptr < gen_code_end);
+ /* if single step mode, we generate only one instruction and
+ generate an exception */
+ if (dc->tf)
+ break;
+ } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
+ (pc_ptr - pc_start) < (TARGET_PAGE_SIZE - 32));
/* we must store the eflags state if it is not already done */
- if (dc->cc_op != CC_OP_DYNAMIC)
- gen_op_set_cc_op(dc->cc_op);
- if (!is_jmp) {
- /* we add an additionnal jmp to update the simulated PC */
- gen_op_jmp_im(ret);
+ if (dc->is_jmp != DISAS_TB_JUMP) {
+ if (dc->cc_op != CC_OP_DYNAMIC)
+ gen_op_set_cc_op(dc->cc_op);
+ if (dc->is_jmp != DISAS_JUMP) {
+ /* we add an additionnal jmp to update the simulated PC */
+ gen_op_jmp_im(ret - (unsigned long)dc->cs_base);
+ }
}
- gen_end();
- *gen_code_size_ptr = gen_code_ptr - gen_code_buf;
+ if (dc->tf) {
+ gen_op_raise_exception(EXCP01_SSTP);
+ }
+ if (dc->is_jmp != 3) {
+ /* indicate that the hash table must be used to find the next TB */
+ gen_op_movl_T0_0();
+ }
+ *gen_opc_ptr = INDEX_op_end;
#ifdef DEBUG_DISAS
if (loglevel) {
- uint8_t *pc;
- int count;
-
- INIT_DISASSEMBLE_INFO(disasm_info, logfile, fprintf);
-#if 0
- disasm_info.flavour = bfd_get_flavour (abfd);
- disasm_info.arch = bfd_get_arch (abfd);
- disasm_info.mach = bfd_get_mach (abfd);
-#endif
-#ifdef WORDS_BIGENDIAN
- disasm_info.endian = BFD_ENDIAN_BIG;
-#else
- disasm_info.endian = BFD_ENDIAN_LITTLE;
-#endif
- fprintf(logfile, "IN:\n");
- disasm_info.buffer = pc_start;
- disasm_info.buffer_vma = (unsigned long)pc_start;
- disasm_info.buffer_length = pc_ptr - pc_start;
- pc = pc_start;
- while (pc < pc_ptr) {
- fprintf(logfile, "0x%08lx: ", (long)pc);
- count = print_insn_i386((unsigned long)pc, &disasm_info);
- fprintf(logfile, "\n");
- pc += count;
- }
+ fprintf(logfile, "----------------\n");
+ fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
+ disas(logfile, pc_start, pc_ptr - pc_start, 0, !dc->code32);
fprintf(logfile, "\n");
-
- pc = gen_code_buf;
- disasm_info.buffer = pc;
- disasm_info.buffer_vma = (unsigned long)pc;
- disasm_info.buffer_length = *gen_code_size_ptr;
- fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);
- while (pc < gen_code_ptr) {
- fprintf(logfile, "0x%08lx: ", (long)pc);
- count = print_insn_i386((unsigned long)pc, &disasm_info);
- fprintf(logfile, "\n");
- pc += count;
- }
+
+ fprintf(logfile, "OP:\n");
+ dump_ops(gen_opc_buf, gen_opparam_buf);
fprintf(logfile, "\n");
}
#endif
+
+ /* optimize flag computations */
+ optimize_flags(gen_opc_buf, gen_opc_ptr - gen_opc_buf);
+
+#ifdef DEBUG_DISAS
+ if (loglevel) {
+ fprintf(logfile, "AFTER FLAGS OPT:\n");
+ dump_ops(gen_opc_buf, gen_opparam_buf);
+ fprintf(logfile, "\n");
+ }
+#endif
+ if (!search_pc)
+ tb->size = pc_ptr - pc_start;
return 0;
}
+int gen_intermediate_code(TranslationBlock *tb)
+{
+ return gen_intermediate_code_internal(tb, 0);
+}
+
+int gen_intermediate_code_pc(TranslationBlock *tb)
+{
+ return gen_intermediate_code_internal(tb, 1);
+}
+
CPUX86State *cpu_x86_init(void)
{
CPUX86State *env;
int i;
+ static int inited;
- cpu_x86_tblocks_init();
+ cpu_exec_init();
env = malloc(sizeof(CPUX86State));
if (!env)
for(i = 0;i < 8; i++)
env->fptags[i] = 1;
env->fpuc = 0x37f;
- /* flags setup */
- env->cc_op = CC_OP_EFLAGS;
- env->df = 1;
+ /* flags setup : we activate the IRQs by default as in user mode */
+ env->eflags = 0x2 | IF_MASK;
+
+ /* init various static tables */
+ if (!inited) {
+ inited = 1;
+ optimize_flags_init();
+ }
return env;
}
{
free(env);
}
+
+/***********************************************************/
+/* x86 mmu */
+/* XXX: add PGE support */
+
+/* called when cr3 or PG bit are modified */
+static int last_pg_state = -1;
+int phys_ram_size;
+int phys_ram_fd;
+uint8_t *phys_ram_base;
+
+void cpu_x86_update_cr0(CPUX86State *env)
+{
+ int pg_state;
+ void *map_addr;
+
+#ifdef DEBUG_MMU
+ printf("CR0 update: CR0=0x%08x\n", env->cr[0]);
+#endif
+ pg_state = env->cr[0] & CR0_PG_MASK;
+ if (pg_state != last_pg_state) {
+ if (!pg_state) {
+ /* we map the physical memory at address 0 */
+
+ map_addr = mmap((void *)0, phys_ram_size, PROT_WRITE | PROT_READ,
+ MAP_SHARED | MAP_FIXED, phys_ram_fd, 0);
+ if (map_addr == MAP_FAILED) {
+ fprintf(stderr,
+ "Could not map physical memory at host address 0x%08x\n",
+ 0);
+ exit(1);
+ }
+ page_set_flags(0, phys_ram_size,
+ PAGE_VALID | PAGE_READ | PAGE_WRITE | PAGE_EXEC);
+ } else {
+ /* we unmap the physical memory */
+ munmap((void *)0, phys_ram_size);
+ page_set_flags(0, phys_ram_size, 0);
+ }
+ last_pg_state = pg_state;
+ }
+}
+
+void cpu_x86_update_cr3(CPUX86State *env)
+{
+ if (env->cr[0] & CR0_PG_MASK) {
+#ifdef DEBUG_MMU
+ printf("CR3 update: CR3=%08x\n", env->cr[3]);
+#endif
+ page_unmap();
+ }
+}
+
+void cpu_x86_init_mmu(CPUX86State *env)
+{
+ last_pg_state = -1;
+ cpu_x86_update_cr0(env);
+}
+
+/* XXX: also flush 4MB pages */
+void cpu_x86_flush_tlb(CPUX86State *env, uint32_t addr)
+{
+ int flags;
+ unsigned long virt_addr;
+
+ flags = page_get_flags(addr);
+ if (flags & PAGE_VALID) {
+ virt_addr = addr & ~0xfff;
+ munmap((void *)virt_addr, 4096);
+ page_set_flags(virt_addr, virt_addr + 4096, 0);
+ }
+}
+
+/* return value:
+ -1 = cannot handle fault
+ 0 = nothing more to do
+ 1 = generate PF fault
+*/
+int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write)
+{
+ uint8_t *pde_ptr, *pte_ptr;
+ uint32_t pde, pte, virt_addr;
+ int cpl, error_code, is_dirty, is_user, prot, page_size;
+ void *map_addr;
+
+ cpl = env->segs[R_CS].selector & 3;
+ is_user = (cpl == 3);
+
+#ifdef DEBUG_MMU
+ printf("MMU fault: addr=0x%08x w=%d u=%d eip=%08x\n",
+ addr, is_write, is_user, env->eip);
+#endif
+
+ if (env->user_mode_only) {
+ /* user mode only emulation */
+ error_code = 0;
+ goto do_fault;
+ }
+
+ if (!(env->cr[0] & CR0_PG_MASK))
+ return -1;
+
+ /* page directory entry */
+ pde_ptr = phys_ram_base + ((env->cr[3] & ~0xfff) + ((addr >> 20) & ~3));
+ pde = ldl(pde_ptr);
+ if (!(pde & PG_PRESENT_MASK)) {
+ error_code = 0;
+ goto do_fault;
+ }
+ if (is_user) {
+ if (!(pde & PG_USER_MASK))
+ goto do_fault_protect;
+ if (is_write && !(pde & PG_RW_MASK))
+ goto do_fault_protect;
+ } else {
+ if ((env->cr[0] & CR0_WP_MASK) && (pde & PG_USER_MASK) &&
+ is_write && !(pde & PG_RW_MASK))
+ goto do_fault_protect;
+ }
+ /* if PSE bit is set, then we use a 4MB page */
+ if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
+ is_dirty = is_write && !(pde & PG_DIRTY_MASK);
+ if (!(pde & PG_ACCESSED_MASK)) {
+ pde |= PG_ACCESSED_MASK;
+ if (is_dirty)
+ pde |= PG_DIRTY_MASK;
+ stl(pde_ptr, pde);
+ }
+
+ pte = pde & ~0x003ff000; /* align to 4MB */
+ page_size = 4096 * 1024;
+ virt_addr = addr & ~0x003fffff;
+ } else {
+ if (!(pde & PG_ACCESSED_MASK)) {
+ pde |= PG_ACCESSED_MASK;
+ stl(pde_ptr, pde);
+ }
+
+ /* page directory entry */
+ pte_ptr = phys_ram_base + ((pde & ~0xfff) + ((addr >> 10) & 0xffc));
+ pte = ldl(pte_ptr);
+ if (!(pte & PG_PRESENT_MASK)) {
+ error_code = 0;
+ goto do_fault;
+ }
+ if (is_user) {
+ if (!(pte & PG_USER_MASK))
+ goto do_fault_protect;
+ if (is_write && !(pte & PG_RW_MASK))
+ goto do_fault_protect;
+ } else {
+ if ((env->cr[0] & CR0_WP_MASK) && (pte & PG_USER_MASK) &&
+ is_write && !(pte & PG_RW_MASK))
+ goto do_fault_protect;
+ }
+ is_dirty = is_write && !(pte & PG_DIRTY_MASK);
+ if (!(pte & PG_ACCESSED_MASK) || is_dirty) {
+ pte |= PG_ACCESSED_MASK;
+ if (is_dirty)
+ pte |= PG_DIRTY_MASK;
+ stl(pte_ptr, pte);
+ }
+ page_size = 4096;
+ virt_addr = addr & ~0xfff;
+ }
+ /* the page can be put in the TLB */
+ prot = PROT_READ;
+ if (is_user) {
+ if (pte & PG_RW_MASK)
+ prot |= PROT_WRITE;
+ } else {
+ if (!(env->cr[0] & CR0_WP_MASK) || !(pte & PG_USER_MASK) ||
+ (pte & PG_RW_MASK))
+ prot |= PROT_WRITE;
+ }
+ map_addr = mmap((void *)virt_addr, page_size, prot,
+ MAP_SHARED | MAP_FIXED, phys_ram_fd, pte & ~0xfff);
+ if (map_addr == MAP_FAILED) {
+ fprintf(stderr,
+ "mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n",
+ pte & ~0xfff, virt_addr);
+ exit(1);
+ }
+ page_set_flags(virt_addr, virt_addr + page_size,
+ PAGE_VALID | PAGE_EXEC | prot);
+#ifdef DEBUG_MMU
+ printf("mmaping 0x%08x to virt 0x%08x pse=%d\n",
+ pte & ~0xfff, virt_addr, (page_size != 4096));
+#endif
+ return 0;
+ do_fault_protect:
+ error_code = PG_ERROR_P_MASK;
+ do_fault:
+ env->cr[2] = addr;
+ env->error_code = (is_write << PG_ERROR_W_BIT) | error_code;
+ if (is_user)
+ env->error_code |= PG_ERROR_U_MASK;
+ return 1;
+}
+
+/***********************************************************/
+/* x86 debug */
+
+static const char *cc_op_str[] = {
+ "DYNAMIC",
+ "EFLAGS",
+ "MUL",
+ "ADDB",
+ "ADDW",
+ "ADDL",
+ "ADCB",
+ "ADCW",
+ "ADCL",
+ "SUBB",
+ "SUBW",
+ "SUBL",
+ "SBBB",
+ "SBBW",
+ "SBBL",
+ "LOGICB",
+ "LOGICW",
+ "LOGICL",
+ "INCB",
+ "INCW",
+ "INCL",
+ "DECB",
+ "DECW",
+ "DECL",
+ "SHLB",
+ "SHLW",
+ "SHLL",
+ "SARB",
+ "SARW",
+ "SARL",
+};
+
+void cpu_x86_dump_state(CPUX86State *env, FILE *f, int flags)
+{
+ int eflags;
+ char cc_op_name[32];
+
+ eflags = env->eflags;
+ fprintf(f, "EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n"
+ "ESI=%08x EDI=%08x EBP=%08x ESP=%08x\n"
+ "EIP=%08x EFL=%08x [%c%c%c%c%c%c%c]\n",
+ env->regs[R_EAX], env->regs[R_EBX], env->regs[R_ECX], env->regs[R_EDX],
+ env->regs[R_ESI], env->regs[R_EDI], env->regs[R_EBP], env->regs[R_ESP],
+ env->eip, eflags,
+ eflags & DF_MASK ? 'D' : '-',
+ eflags & CC_O ? 'O' : '-',
+ eflags & CC_S ? 'S' : '-',
+ eflags & CC_Z ? 'Z' : '-',
+ eflags & CC_A ? 'A' : '-',
+ eflags & CC_P ? 'P' : '-',
+ eflags & CC_C ? 'C' : '-');
+ fprintf(f, "CS=%04x SS=%04x DS=%04x ES=%04x FS=%04x GS=%04x\n",
+ env->segs[R_CS].selector,
+ env->segs[R_SS].selector,
+ env->segs[R_DS].selector,
+ env->segs[R_ES].selector,
+ env->segs[R_FS].selector,
+ env->segs[R_GS].selector);
+ if (flags & X86_DUMP_CCOP) {
+ if ((unsigned)env->cc_op < CC_OP_NB)
+ strcpy(cc_op_name, cc_op_str[env->cc_op]);
+ else
+ snprintf(cc_op_name, sizeof(cc_op_name), "[%d]", env->cc_op);
+ fprintf(f, "CCS=%08x CCD=%08x CCO=%-8s\n",
+ env->cc_src, env->cc_dst, cc_op_name);
+ }
+ if (flags & X86_DUMP_FPU) {
+ fprintf(f, "ST0=%f ST1=%f ST2=%f ST3=%f\n",
+ (double)env->fpregs[0],
+ (double)env->fpregs[1],
+ (double)env->fpregs[2],
+ (double)env->fpregs[3]);
+ fprintf(f, "ST4=%f ST5=%f ST6=%f ST7=%f\n",
+ (double)env->fpregs[4],
+ (double)env->fpregs[5],
+ (double)env->fpregs[7],
+ (double)env->fpregs[8]);
+ }
+}
projects / qemu.git / blobdiff